com.sun.jna.platform.win32

Class DdemlUtil.DdeClient

java.lang.Object

com.sun.jna.platform.win32.DdemlUtil.DdeClient

All Implemented Interfaces:

DdemlUtil.IDdeClient, java.io.Closeable, java.lang.AutoCloseable

Enclosing class:

DdemlUtil

public static class DdemlUtil.DdeClient
extends java.lang.Object
implements DdemlUtil.IDdeClient

Constructor Summary

Constructors

Constructor and Description
DdeClient()

Method Summary

Modifier and Type	Method and Description
void	abandonTransactions() Abandons all asynchronous transaction and releases all resources associated with the transaction.
Pointer	accessData(Ddeml.HDDEDATA hData, WinDef.DWORDByReference pcbDataSize) An application must call the DdeUnaccessData function when it has finished accessing the data in the object.
Ddeml.HDDEDATA	addData(Ddeml.HDDEDATA hData, Pointer pSrc, int cb, int cbOff) Adds data to the specified Dynamic Data Exchange (DDE) object.
void	close()
DdemlUtil.IDdeConnection	connect(Ddeml.HSZ service, Ddeml.HSZ topic, Ddeml.CONVCONTEXT convcontext) Establishes a conversation with a server application that supports the specified service name and topic name pair.
DdemlUtil.IDdeConnection	connect(java.lang.String service, java.lang.String topic, Ddeml.CONVCONTEXT convcontext) Establishes a conversation with a server application that supports the specified service name and topic name pair.
DdemlUtil.IDdeConnectionList	connectList(Ddeml.HSZ service, Ddeml.HSZ topic, DdemlUtil.IDdeConnectionList existingList, Ddeml.CONVCONTEXT ctx) Establishes a conversation with all server applications that support the specified service name and topic name pair.
DdemlUtil.IDdeConnectionList	connectList(java.lang.String service, java.lang.String topic, DdemlUtil.IDdeConnectionList existingList, Ddeml.CONVCONTEXT ctx) Establishes a conversation with all server applications that support the specified service name and topic name pair.
Ddeml.HDDEDATA	createDataHandle(Pointer pSrc, int cb, int cbOff, Ddeml.HSZ hszItem, int wFmt, int afCmd) Creates a Dynamic Data Exchange (DDE) object and fills the object with data from the specified buffer.
Ddeml.HSZ	createStringHandle(java.lang.String value) Creates a handle that identifies the specified string.
boolean	enableCallback(int wCmd) Enables or disables transactions for a specific conversation or for all conversations currently established by the calling application.
void	freeDataHandle(Ddeml.HDDEDATA hData) Frees a Dynamic Data Exchange (DDE) object and deletes the data handle associated with the object.
boolean	freeStringHandle(Ddeml.HSZ value) Frees a string handle in the calling application.
int	getData(Ddeml.HDDEDATA hData, Pointer pDst, int cbMax, int cbOff) Copies data from the specified Dynamic Data Exchange (DDE) object to the specified local buffer.
java.lang.Integer	getInstanceIdentitifier()
int	getLastError()
void	initialize(int afCmd) Registers an application with the Dynamic Data Exchange Management Library (DDEML).
boolean	keepStringHandle(Ddeml.HSZ value) Increments the usage count associated with the specified handle.
void	nameService(Ddeml.HSZ name, int afCmd) Registers or unregisters the service names a Dynamic Data Exchange (DDE) server supports.
void	nameService(java.lang.String name, int afCmd) Registers or unregisters the service names a Dynamic Data Exchange (DDE) server supports.
void	postAdvise(Ddeml.HSZ hszTopic, Ddeml.HSZ hszItem) Causes the system to send an XTYP_ADVREQ transaction to the calling (server) application's Dynamic Data Exchange (DDE) callback function for each client with an active advise loop on the specified topic and item.
void	postAdvise(java.lang.String topic, java.lang.String item) Causes the system to send an XTYP_ADVREQ transaction to the calling (server) application's Dynamic Data Exchange (DDE) callback function for each client with an active advise loop on the specified topic and item.
java.lang.String	queryString(Ddeml.HSZ value) Copies text associated with a string handle into a buffer.
void	registerAdvdataHandler(DdemlUtil.AdvdataHandler handler)
void	registerAdvReqHandler(DdemlUtil.AdvreqHandler handler)
void	registerAdvstartHandler(DdemlUtil.AdvstartHandler handler)
void	registerAdvstopHandler(DdemlUtil.AdvstopHandler handler)
void	registerConnectConfirmHandler(DdemlUtil.ConnectConfirmHandler handler)
void	registerConnectHandler(DdemlUtil.ConnectHandler handler)
void	registerDisconnectHandler(DdemlUtil.DisconnectHandler handler)
void	registerErrorHandler(DdemlUtil.ErrorHandler handler)
void	registerExecuteHandler(DdemlUtil.ExecuteHandler handler)
void	registerMonitorHandler(DdemlUtil.MonitorHandler handler)
void	registerPokeHandler(DdemlUtil.PokeHandler handler)
void	registerRegisterHandler(DdemlUtil.RegisterHandler handler)
void	registerRequestHandler(DdemlUtil.RequestHandler handler)
void	registerUnregisterHandler(DdemlUtil.UnregisterHandler handler)
void	registerWildconnectHandler(DdemlUtil.WildconnectHandler handler)
void	registerXactCompleteHandler(DdemlUtil.XactCompleteHandler handler)
void	unaccessData(Ddeml.HDDEDATA hData) Unaccesses a Dynamic Data Exchange (DDE) object.
boolean	uninitialize() Frees all Dynamic Data Exchange Management Library (DDEML) resources associated with the calling application.
void	unregisterAdvdataHandler(DdemlUtil.AdvdataHandler handler)
void	unregisterAdvReqHandler(DdemlUtil.AdvreqHandler handler)
void	unregisterAdvstartHandler(DdemlUtil.AdvstartHandler handler)
void	unregisterAdvstopHandler(DdemlUtil.AdvstopHandler handler)
void	unregisterConnectConfirmHandler(DdemlUtil.ConnectConfirmHandler handler)
void	unregisterConnectHandler(DdemlUtil.ConnectHandler handler)
void	unregisterDisconnectHandler(DdemlUtil.DisconnectHandler handler)
void	unregisterErrorHandler(DdemlUtil.ErrorHandler handler)
void	unregisterExecuteHandler(DdemlUtil.ExecuteHandler handler)
void	unregisterMonitorHandler(DdemlUtil.MonitorHandler handler)
void	unregisterPokeHandler(DdemlUtil.PokeHandler handler)
void	unregisterRegisterHandler(DdemlUtil.RegisterHandler handler)
void	unregisterRequestHandler(DdemlUtil.RequestHandler handler)
void	unregisterUnregisterHandler(DdemlUtil.UnregisterHandler handler)
void	unregisterWildconnectHandler(DdemlUtil.WildconnectHandler handler)
void	unregisterXactCompleteHandler(DdemlUtil.XactCompleteHandler handler)
DdemlUtil.IDdeConnection	wrap(Ddeml.HCONV hconv) Wrap a connection handle into a IDdeConnection helper class.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DdeClient

public DdeClient()

Method Detail

getInstanceIdentitifier

public java.lang.Integer getInstanceIdentitifier()

Specified by:

getInstanceIdentitifier in interface DdemlUtil.IDdeClient

initialize

public void initialize(int afCmd)
                throws DdemlUtil.DdemlException

Description copied from interface: DdemlUtil.IDdeClient

Registers an application with the Dynamic Data Exchange Management Library (DDEML). An application must call this function before calling any other Dynamic Data Exchange Management Library (DDEML) function.

Specified by:

initialize in interface DdemlUtil.IDdeClient

Parameters:

afCmd - A set of APPCMD_, CBF_, and MF_ flags. The APPCMD_ flags provide special instructions to DdeInitialize. The CBF_ flags specify filters that prevent specific types of transactions from reaching the callback function. The MF_ flags specify the types of DDE activity that a DDE monitoring application monitors. Using these flags enhances the performance of a DDE application by eliminating unnecessary calls to the callback function.

This parameter can be one or more of the following values.

Value	Meaning
APPCLASS_MONITOR 0x00000001L	Makes it possible for the application to monitor DDE activity in the system. This flag is for use by DDE monitoring applications. The application specifies the types of DDE activity to monitor by combining one or more monitor flags with the APPCLASS_MONITOR flag. For details, see the following Remarks section.
APPCLASS_STANDARD 0x00000000L	Registers the application as a standard (nonmonitoring) DDEML application.
APPCMD_CLIENTONLY 0x00000010L	Prevents the application from becoming a server in a DDE conversation. The application can only be a client. This flag reduces consumption of resources by the DDEML. It includes the functionality of the CBF_FAIL_ALLSVRXACTIONS flag.
APPCMD_FILTERINITS 0x00000020L	Prevents the DDEML from sending XTYP_CONNECT and XTYP_WILDCONNECT transactions to the application until the application has created its string handles and registered its service names or has turned off filtering by a subsequent call to the DdeNameService or DdeInitialize function. This flag is always in effect when an application calls DdeInitialize for the first time, regardless of whether the application specifies the flag. On subsequent calls to DdeInitialize, not specifying this flag turns off the application's service-name filters, but specifying it turns on the application's service name filters.
CBF_FAIL_ALLSVRXACTIONS 0x0003f000	Prevents the callback function from receiving server transactions. The system returns DDE_FNOTPROCESSED to each client that sends a transaction to this application. This flag is equivalent to combining all CBF_FAIL_ flags.
CBF_FAIL_ADVISES 0x00004000	Prevents the callback function from receiving XTYP_ADVSTART and XTYP_ADVSTOP transactions. The system returns DDE_FNOTPROCESSED to each client that sends an XTYP_ADVSTART or XTYP_ADVSTOP transaction to the server.
CBF_FAIL_CONNECTIONS 0x00002000	Prevents the callback function from receiving XTYP_CONNECT and XTYP_WILDCONNECT transactions.
CBF_FAIL_EXECUTES 0x00008000	Prevents the callback function from receiving XTYP_EXECUTE transactions. The system returns DDE_FNOTPROCESSED to a client that sends an XTYP_EXECUTE transaction to the server.
CBF_FAIL_POKES 0x00010000	Prevents the callback function from receiving XTYP_POKE transactions. The system returns DDE_FNOTPROCESSED to a client that sends an XTYP_POKE transaction to the server.
CBF_FAIL_REQUESTS 0x00020000	Prevents the callback function from receiving XTYP_REQUEST transactions. The system returns DDE_FNOTPROCESSED to a client that sends an XTYP_REQUEST transaction to the server.
CBF_FAIL_SELFCONNECTIONS 0x00001000	Prevents the callback function from receiving XTYP_CONNECT transactions from the application's own instance. This flag prevents an application from establishing a DDE conversation with its own instance. An application should use this flag if it needs to communicate with other instances of itself but not with itself.
CBF_SKIP_ALLNOTIFICATIONS 0x003c0000	Prevents the callback function from receiving any notifications. This flag is equivalent to combining all CBF_SKIP_ flags.
CBF_SKIP_CONNECT_CONFIRMS 0x00040000	Prevents the callback function from receiving XTYP_CONNECT_CONFIRM notifications.
CBF_SKIP_DISCONNECTS 0x00200000	Prevents the callback function from receiving XTYP_DISCONNECT notifications.
CBF_SKIP_REGISTRATIONS 0x00080000	Prevents the callback function from receiving XTYP_REGISTER notifications.
CBF_SKIP_UNREGISTRATIONS 0x00100000	Prevents the callback function from receiving XTYP_UNREGISTER notifications.
MF_CALLBACKS 0x08000000	Notifies the callback function whenever a transaction is sent to any DDE callback function in the system.
MF_CONV 0x40000000	Notifies the callback function whenever a conversation is established or terminated.
MF_ERRORS 0x10000000	Notifies the callback function whenever a DDE error occurs.
MF_HSZ_INFO 0x01000000	Notifies the callback function whenever a DDE application creates, frees, or increments the usage count of a string handle or whenever a string handle is freed as a result of a call to the DdeUninitialize function.
MF_LINKS 0x20000000	Notifies the callback function whenever an advise loop is started or ended.
MF_POSTMSGS 0x04000000	Notifies the callback function whenever the system or an application posts a DDE message.
MF_SENDMSGS 0x02000000	Notifies the callback function whenever the system or an application sends a DDE message.

If the function failsa DdemlException is raised with one of the following errroCodes:

• DMLERR_DLL_USAGE
• DMLERR_INVALIDPARAMETER
• DMLERR_SYS_ERROR

Throws:

DdemlUtil.DdemlException

createStringHandle

public Ddeml.HSZ createStringHandle(java.lang.String value)
                             throws DdemlUtil.DdemlException

Description copied from interface: DdemlUtil.IDdeClient

Creates a handle that identifies the specified string. A Dynamic Data Exchange (DDE) client or server application can pass the string handle as a parameter to other Dynamic Data Exchange Management Library (DDEML) functions.

Specified by:

createStringHandle in interface DdemlUtil.IDdeClient

Parameters:

value - The string for which a handle is to be created. This string can be up to 255 characters. The reason for this limit is that DDEML string management functions are implemented using atoms.

Returns:

If the function succeeds, the return value is a string handle. A parameter NULL will cause NULL to be returned.

If the function fails, a DdemlException is raised with the corresponding errorCode:

• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR
• DMLERR_SYS_ERROR

Throws:

DdemlUtil.DdemlException

nameService

public void nameService(Ddeml.HSZ name,
                        int afCmd)
                 throws DdemlUtil.DdemlException

Description copied from interface: DdemlUtil.IDdeClient

Registers or unregisters the service names a Dynamic Data Exchange (DDE) server supports. This function causes the system to send XTYP_REGISTER or XTYP_UNREGISTER transactions to other running Dynamic Data Exchange Management Library (DDEML) client applications.

Specified by:

nameService in interface DdemlUtil.IDdeClient

Parameters:

name - A handle to the string that specifies the service name the server is registering or unregistering. An application that is unregistering all of its service names should set this parameter to 0L.

afCmd - The service name options. This parameter can be one of the following values.

Value	Meaning
DNS_REGISTER	Registers the error code service name.
DNS_UNREGISTER	Unregisters the error code service name. If the hsz1 parameter is 0L, all service names registered by the server will be unregistered.
DNS_FILTERON	Turns on service name initiation filtering. The filter prevents a server from receiving XTYP_CONNECT transactions for service names it has not registered. This is the default setting for this filter. If a server application does not register any service names, the application cannot receive XTYP_WILDCONNECT transactions.
DNS_FILTEROFF	Turns off service name initiation filtering. If this flag is specified, the server receives an XTYP_CONNECT transaction whenever another DDE application calls the DdeConnect function, regardless of the service name.

If the function fails, a DdemlException is raised with the corresponding errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_DLL_USAGE
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

Throws:

DdemlUtil.DdemlException

nameService

public void nameService(java.lang.String name,
                        int afCmd)
                 throws DdemlUtil.DdemlException

Description copied from interface: DdemlUtil.IDdeClient

Registers or unregisters the service names a Dynamic Data Exchange (DDE) server supports. This function causes the system to send XTYP_REGISTER or XTYP_UNREGISTER transactions to other running Dynamic Data Exchange Management Library (DDEML) client applications.

Specified by:

nameService in interface DdemlUtil.IDdeClient

Parameters:

name - A string that specifies the service name the server is registering or unregistering. An application that is unregistering all of its service names should set this parameter to NULL.

afCmd - The service name options. This parameter can be one of the following values.

Value	Meaning
DNS_REGISTER	Registers the error code service name.
DNS_UNREGISTER	Unregisters the error code service name. If the hsz1 parameter is 0L, all service names registered by the server will be unregistered.
DNS_FILTERON	Turns on service name initiation filtering. The filter prevents a server from receiving XTYP_CONNECT transactions for service names it has not registered. This is the default setting for this filter. If a server application does not register any service names, the application cannot receive XTYP_WILDCONNECT transactions.
DNS_FILTEROFF	Turns off service name initiation filtering. If this flag is specified, the server receives an XTYP_CONNECT transaction whenever another DDE application calls the DdeConnect function, regardless of the service name.

If the function fails, a DdemlException is raised with the corresponding errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_DLL_USAGE
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

Throws:

DdemlUtil.DdemlException

getLastError

public int getLastError()

Specified by:

getLastError in interface DdemlUtil.IDdeClient

Returns:

See Ddeml.DMLERR_*

connect

public DdemlUtil.IDdeConnection connect(Ddeml.HSZ service,
                                        Ddeml.HSZ topic,
                                        Ddeml.CONVCONTEXT convcontext)

Description copied from interface: DdemlUtil.IDdeClient

Establishes a conversation with a server application that supports the specified service name and topic name pair. If more than one such server exists, the system selects only one.

Specified by:

connect in interface DdemlUtil.IDdeClient

Parameters:

service - A handle to the string that specifies the service name of the server application with which a conversation is to be established. This handle must have been created by a previous call to the DdeCreateStringHandle function. If this parameter is 0L, a conversation is established with any available server.

topic - A handle to the string that specifies the name of the topic on which a conversation is to be established. This handle must have been created by a previous call to DdeCreateStringHandle. If this parameter is 0L, a conversation on any topic supported by the selected server is established.

convcontext - A pointer to the CONVCONTEXT structure that contains conversation context information. If this parameter is NULL, the server receives the default CONVCONTEXT structure during the XTYP_CONNECT or XTYP_WILDCONNECT transaction.

Returns:

an established connection

If the function fails, a DdemlException is raised with the corresponding errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_CONV_ESTABLISHED
• DMLERR_NO_ERROR

connect

public DdemlUtil.IDdeConnection connect(java.lang.String service,
                                        java.lang.String topic,
                                        Ddeml.CONVCONTEXT convcontext)

Description copied from interface: DdemlUtil.IDdeClient

Establishes a conversation with a server application that supports the specified service name and topic name pair. If more than one such server exists, the system selects only one.

Specified by:

connect in interface DdemlUtil.IDdeClient

Parameters:

service - The service name of the server application with which a conversation is to be established. If this parameter is NULL, a conversation is established with any available server.

topic - The name of the topic on which a conversation is to be established. If this parameter is NULL, a conversation on any topic supported by the selected server is established.

convcontext - A pointer to the CONVCONTEXT structure that contains conversation context information. If this parameter is NULL, the server receives the default CONVCONTEXT structure during the XTYP_CONNECT or XTYP_WILDCONNECT transaction.

Returns:

an established connection

If the function fails, a DdemlException is raised with the corresponding errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_CONV_ESTABLISHED
• DMLERR_NO_ERROR

queryString

public java.lang.String queryString(Ddeml.HSZ value)
                             throws DdemlUtil.DdemlException

Description copied from interface: DdemlUtil.IDdeClient

Copies text associated with a string handle into a buffer.

Specified by:

queryString in interface DdemlUtil.IDdeClient

Parameters:

value - A handle to the string to copy. This handle must have been created by a previous call to the DdeCreateStringHandle function.

Returns:

String corresponding to the supplied handle

Throws:

DdemlUtil.DdemlException

createDataHandle

public Ddeml.HDDEDATA createDataHandle(Pointer pSrc,
                                       int cb,
                                       int cbOff,
                                       Ddeml.HSZ hszItem,
                                       int wFmt,
                                       int afCmd)

Description copied from interface: DdemlUtil.IDdeClient

Creates a Dynamic Data Exchange (DDE) object and fills the object with data from the specified buffer. A DDE application uses this function during transactions that involve passing data to the partner application.

Specified by:

createDataHandle in interface DdemlUtil.IDdeClient

Parameters:

pSrc - The data to be copied to the DDE object. If this parameter is NULL, no data is copied to the object.

cb - The amount of memory, in bytes, to copy from the buffer pointed to by pSrc. (include the terminating NULL, if the data is a string). If this parameter is zero, the pSrc parameter is ignored.

cbOff - An offset, in bytes, from the beginning of the buffer pointed to by the pSrc parameter. The data beginning at this offset is copied from the buffer to the DDE object.

hszItem - A handle to the string that specifies the data item corresponding to the DDE object. This handle must have been created by a previous call to the DdeCreateStringHandle function. If the data handle is to be used in an XTYP_EXECUTE transaction, this parameter must be 0L.

wFmt - The standard clipboard format of the data.

afCmd - The creation flags. This parameter can be HDATA_APPOWNED, which specifies that the server application calling the DdeCreateDataHandle function owns the data handle this function creates. This flag enables the application to share the data handle with other DDEML applications rather than creating a separate handle to pass to each application. If this flag is specified, the application must eventually free the shared memory object associated with the handle by using the DdeFreeDataHandle function. If this flag is not specified, the handle becomes invalid in the application that created the handle after the data handle is returned by the application's DDE callback function or is used as a parameter in another DDEML function.

Returns:

If the function succeeds, the return value is a data handle.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_MEMORY_ERROR
• DMLERR_NO_ERROR

freeDataHandle

public void freeDataHandle(Ddeml.HDDEDATA hData)

Description copied from interface: DdemlUtil.IDdeClient

Frees a Dynamic Data Exchange (DDE) object and deletes the data handle associated with the object.

Specified by:

freeDataHandle in interface DdemlUtil.IDdeClient

Parameters:

hData - A handle to the DDE object to be freed. This handle must have been created by a previous call to the DdeCreateDataHandle function or returned by the DdeClientTransaction function.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

addData

public Ddeml.HDDEDATA addData(Ddeml.HDDEDATA hData,
                              Pointer pSrc,
                              int cb,
                              int cbOff)

Description copied from interface: DdemlUtil.IDdeClient

Adds data to the specified Dynamic Data Exchange (DDE) object. An application can add data starting at any offset from the beginning of the object. If new data overlaps data already in the object, the new data overwrites the old data in the bytes where the overlap occurs. The contents of locations in the object that have not been written to are undefined.

Specified by:

addData in interface DdemlUtil.IDdeClient

Parameters:

hData - A handle to the DDE object that receives additional data.

pSrc - The data to be added to the DDE object.

cb - The length, in bytes, of the data to be added to the DDE object, including the terminating NULL, if the data is a string.

cbOff - An offset, in bytes, from the beginning of the DDE object. The additional data is copied to the object beginning at this offset.

Returns:

If the function succeeds, the return value is a new handle to the DDE object. The new handle is used in all references to the object.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_MEMORY_ERROR
• DMLERR_NO_ERROR

getData

public int getData(Ddeml.HDDEDATA hData,
                   Pointer pDst,
                   int cbMax,
                   int cbOff)

Description copied from interface: DdemlUtil.IDdeClient

Copies data from the specified Dynamic Data Exchange (DDE) object to the specified local buffer.

Specified by:

getData in interface DdemlUtil.IDdeClient

Parameters:

hData - A handle to the DDE object that contains the data to copy.

pDst - A pointer to the buffer that receives the data. If this parameter is NULL, the DdeGetData function returns the amount of data, in bytes, that would be copied to the buffer.

cbMax - The maximum amount of data, in bytes, to copy to the buffer pointed to by the pDst parameter. Typically, this parameter specifies the length of the buffer pointed to by pDst.

cbOff - An offset within the DDE object. Data is copied from the object beginning at this offset.

Returns:

If the pDst parameter points to a buffer, the return value is the size, in bytes, of the memory object associated with the data handle or the size specified in the cbMax parameter, whichever is lower.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

accessData

public Pointer accessData(Ddeml.HDDEDATA hData,
                          WinDef.DWORDByReference pcbDataSize)

Description copied from interface: DdemlUtil.IDdeClient

An application must call the DdeUnaccessData function when it has finished accessing the data in the object.

Specified by:

accessData in interface DdemlUtil.IDdeClient

Parameters:

hData - A handle to the DDE object to be accessed.

pcbDataSize - A pointer to a variable that receives the size, in bytes, of the DDE object identified by the hData parameter. If this parameter is NULL, no size information is returned.

Returns:

If the function succeeds, the return value is a pointer to the first byte of data in the DDE object.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

unaccessData

public void unaccessData(Ddeml.HDDEDATA hData)

Description copied from interface: DdemlUtil.IDdeClient

Unaccesses a Dynamic Data Exchange (DDE) object. An application must call this function after it has finished accessing the object.

Specified by:

unaccessData in interface DdemlUtil.IDdeClient

Parameters:

hData - A handle to the DDE object.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

postAdvise

public void postAdvise(Ddeml.HSZ hszTopic,
                       Ddeml.HSZ hszItem)

Description copied from interface: DdemlUtil.IDdeClient

Causes the system to send an XTYP_ADVREQ transaction to the calling (server) application's Dynamic Data Exchange (DDE) callback function for each client with an active advise loop on the specified topic and item. A server application should call this function whenever the data associated with the topic name or item name pair changes.

Specified by:

postAdvise in interface DdemlUtil.IDdeClient

Parameters:

hszTopic - A handle to a string that specifies the topic name. To send notifications for all topics with active advise loops, an application can set this parameter to 0L.

hszItem - A handle to a string that specifies the item name. To send notifications for all items with active advise loops, an application can set this parameter to 0L.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_DLL_USAGE
• DMLERR_NO_ERROR

postAdvise

public void postAdvise(java.lang.String topic,
                       java.lang.String item)

Description copied from interface: DdemlUtil.IDdeClient

Causes the system to send an XTYP_ADVREQ transaction to the calling (server) application's Dynamic Data Exchange (DDE) callback function for each client with an active advise loop on the specified topic and item. A server application should call this function whenever the data associated with the topic name or item name pair changes.

Specified by:

postAdvise in interface DdemlUtil.IDdeClient

Parameters:

topic - A string that specifies the topic name. To send notifications for all topics with active advise loops, an application can set this parameter to NULL.

item - A string that specifies the item name. To send notifications for all items with active advise loops, an application can set this parameter to NULL.

If the function fails a DdeException is raised with the following errorCodes:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_DLL_USAGE
• DMLERR_NO_ERROR

freeStringHandle

public boolean freeStringHandle(Ddeml.HSZ value)

Description copied from interface: DdemlUtil.IDdeClient

Frees a string handle in the calling application.

Specified by:

freeStringHandle in interface DdemlUtil.IDdeClient

Parameters:

value - A handle to the string handle to be freed. This handle must have been created by a previous call to the createStringHandle function. A NULL value will be silently ignored.

Returns:

true if the function succeeds.

keepStringHandle

public boolean keepStringHandle(Ddeml.HSZ value)

Description copied from interface: DdemlUtil.IDdeClient

Increments the usage count associated with the specified handle. This function enables an application to save a string handle passed to the application's Dynamic Data Exchange (DDE) callback function. Otherwise, a string handle passed to the callback function is deleted when the callback function returns. This function should also be used to keep a copy of a string handle referenced by the CONVINFO structure returned by the DdeQueryConvInfo function.

Specified by:

keepStringHandle in interface DdemlUtil.IDdeClient

Parameters:

value - A handle to the string handle to be saved.

Returns:

true if the function succeeded

abandonTransactions

public void abandonTransactions()

Description copied from interface: DdemlUtil.IDdeClient

Abandons all asynchronous transaction and releases all resources associated with the transaction.

If the method fails a DdeException will be raised with the corresponding errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR
• DMLERR_UNFOUND_QUEUE_ID

Specified by:

abandonTransactions in interface DdemlUtil.IDdeClient

connectList

public DdemlUtil.IDdeConnectionList connectList(Ddeml.HSZ service,
                                                Ddeml.HSZ topic,
                                                DdemlUtil.IDdeConnectionList existingList,
                                                Ddeml.CONVCONTEXT ctx)

Description copied from interface: DdemlUtil.IDdeClient

Establishes a conversation with all server applications that support the specified service name and topic name pair. An application can also use this function to obtain a list of conversation handles by passing the function an existing conversation handle. The Dynamic Data Exchange Management Library removes the handles of any terminated conversations from the conversation list. The resulting conversation list contains the handles of all currently established conversations that support the specified service name and topic name.

Specified by:

connectList in interface DdemlUtil.IDdeClient

Parameters:

service - A handle to the string that specifies the service name of the server application with which a conversation is to be established. If this parameter is 0L, the system attempts to establish conversations with all available servers that support the specified topic name.

topic - A handle to the string that specifies the name of the topic on which a conversation is to be established. This handle must have been created by a previous call to the DdeCreateStringHandle function. If this parameter is 0L, the system will attempt to establish conversations on all topics supported by the selected server (or servers).

existingList - An existinct conversation list to be enumerated. This parameter should be NULL if a new conversation list is to be established.

ctx - A pointer to the CONVCONTEXT structure that contains conversation-context information. If this parameter is NULL, the server receives the default CONVCONTEXT structure during the XTYP_CONNECT or XTYP_WILDCONNECT transaction.

Returns:

The new ConnectionList

If the function fails a DdeException is raised with the appropriate errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_CONV_ESTABLISHED
• DMLERR_NO_ERROR
• DMLERR_SYS_ERROR

connectList

public DdemlUtil.IDdeConnectionList connectList(java.lang.String service,
                                                java.lang.String topic,
                                                DdemlUtil.IDdeConnectionList existingList,
                                                Ddeml.CONVCONTEXT ctx)

Description copied from interface: DdemlUtil.IDdeClient

Establishes a conversation with all server applications that support the specified service name and topic name pair. An application can also use this function to obtain a list of conversation handles by passing the function an existing conversation handle. The Dynamic Data Exchange Management Library removes the handles of any terminated conversations from the conversation list. The resulting conversation list contains the handles of all currently established conversations that support the specified service name and topic name.

Specified by:

connectList in interface DdemlUtil.IDdeClient

Parameters:

service - A string that specifies the service name of the server application with which a conversation is to be established. If this parameter is NULL, the system attempts to establish conversations with all available servers that support the specified topic name.

topic - A string that specifies the name of the topic on which a conversation is to be established. If this parameter is NULL, the system will attempt to establish conversations on all topics supported by the selected server (or servers).

existingList - An existinct conversation list to be enumerated. This parameter should be NULL if a new conversation list is to be established.

ctx - A pointer to the CONVCONTEXT structure that contains conversation-context information. If this parameter is NULL, the server receives the default CONVCONTEXT structure during the XTYP_CONNECT or XTYP_WILDCONNECT transaction.

Returns:

The new ConnectionList

If the function fails a DdeException is raised with the appropriate errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_CONV_ESTABLISHED
• DMLERR_NO_ERROR
• DMLERR_SYS_ERROR

enableCallback

public boolean enableCallback(int wCmd)

Description copied from interface: DdemlUtil.IDdeClient

Enables or disables transactions for a specific conversation or for all conversations currently established by the calling application.

Specified by:

enableCallback in interface DdemlUtil.IDdeClient

Parameters:

wCmd - The function code. This parameter can be one of the following values.

Value	Meaning
EC_ENABLEALL	Enables all transactions for the specified conversation.
EC_ENABLEONE	Enables one transaction for the specified conversation.
EC_DISABLE	Disables all blockable transactions for the specified conversation. A server application can disable the following transactions: XTYP_ADVSTART XTYP_ADVSTOP XTYP_EXECUTE XTYP_POKE XTYP_REQUEST A client application can disable the following transactions: XTYP_ADVDATA XTYP_XACT_COMPLETE
EC_QUERYWAITING	Determines whether any transactions are in the queue for the specified conversation.

Returns:

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.

If the wCmd parameter is EC_QUERYWAITING, and the application transaction queue contains one or more unprocessed transactions that are not being processed, the return value is TRUE; otherwise, it is FALSE.

If the function fails a DdeException is raised with the appropriate errorCode:

• DMLERR_DLL_NOT_INITIALIZED
• DMLERR_INVALIDPARAMETER
• DMLERR_NO_ERROR

uninitialize

public boolean uninitialize()

Description copied from interface: DdemlUtil.IDdeClient

Frees all Dynamic Data Exchange Management Library (DDEML) resources associated with the calling application.

Specified by:

uninitialize in interface DdemlUtil.IDdeClient

Returns:

true if function succeeded

close

public void close()

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

wrap

public DdemlUtil.IDdeConnection wrap(Ddeml.HCONV hconv)

Description copied from interface: DdemlUtil.IDdeClient

Wrap a connection handle into a IDdeConnection helper class.

Specified by:

wrap in interface DdemlUtil.IDdeClient

Parameters:

hconv - HCONV structure to wrap

Returns:

wrapped IDdeConnection

unregisterDisconnectHandler

public void unregisterDisconnectHandler(DdemlUtil.DisconnectHandler handler)

Specified by:

unregisterDisconnectHandler in interface DdemlUtil.IDdeClient

registerAdvstartHandler

public void registerAdvstartHandler(DdemlUtil.AdvstartHandler handler)

Specified by:

registerAdvstartHandler in interface DdemlUtil.IDdeClient

unregisterAdvstartHandler

public void unregisterAdvstartHandler(DdemlUtil.AdvstartHandler handler)

Specified by:

unregisterAdvstartHandler in interface DdemlUtil.IDdeClient

registerAdvstopHandler

public void registerAdvstopHandler(DdemlUtil.AdvstopHandler handler)

Specified by:

registerAdvstopHandler in interface DdemlUtil.IDdeClient

unregisterAdvstopHandler

public void unregisterAdvstopHandler(DdemlUtil.AdvstopHandler handler)

Specified by:

unregisterAdvstopHandler in interface DdemlUtil.IDdeClient

registerConnectHandler

public void registerConnectHandler(DdemlUtil.ConnectHandler handler)

Specified by:

registerConnectHandler in interface DdemlUtil.IDdeClient

unregisterConnectHandler

public void unregisterConnectHandler(DdemlUtil.ConnectHandler handler)

Specified by:

unregisterConnectHandler in interface DdemlUtil.IDdeClient

registerAdvReqHandler

public void registerAdvReqHandler(DdemlUtil.AdvreqHandler handler)

Specified by:

registerAdvReqHandler in interface DdemlUtil.IDdeClient

unregisterAdvReqHandler

public void unregisterAdvReqHandler(DdemlUtil.AdvreqHandler handler)

Specified by:

unregisterAdvReqHandler in interface DdemlUtil.IDdeClient

registerRequestHandler

public void registerRequestHandler(DdemlUtil.RequestHandler handler)

Specified by:

registerRequestHandler in interface DdemlUtil.IDdeClient

unregisterRequestHandler

public void unregisterRequestHandler(DdemlUtil.RequestHandler handler)

Specified by:

unregisterRequestHandler in interface DdemlUtil.IDdeClient

registerWildconnectHandler

public void registerWildconnectHandler(DdemlUtil.WildconnectHandler handler)

Specified by:

registerWildconnectHandler in interface DdemlUtil.IDdeClient

unregisterWildconnectHandler

public void unregisterWildconnectHandler(DdemlUtil.WildconnectHandler handler)

Specified by:

unregisterWildconnectHandler in interface DdemlUtil.IDdeClient

registerAdvdataHandler

public void registerAdvdataHandler(DdemlUtil.AdvdataHandler handler)

Specified by:

registerAdvdataHandler in interface DdemlUtil.IDdeClient

unregisterAdvdataHandler

public void unregisterAdvdataHandler(DdemlUtil.AdvdataHandler handler)

Specified by:

unregisterAdvdataHandler in interface DdemlUtil.IDdeClient

registerExecuteHandler

public void registerExecuteHandler(DdemlUtil.ExecuteHandler handler)

Specified by:

registerExecuteHandler in interface DdemlUtil.IDdeClient

unregisterExecuteHandler

public void unregisterExecuteHandler(DdemlUtil.ExecuteHandler handler)

Specified by:

unregisterExecuteHandler in interface DdemlUtil.IDdeClient

registerPokeHandler

public void registerPokeHandler(DdemlUtil.PokeHandler handler)

Specified by:

registerPokeHandler in interface DdemlUtil.IDdeClient

unregisterPokeHandler

public void unregisterPokeHandler(DdemlUtil.PokeHandler handler)

Specified by:

unregisterPokeHandler in interface DdemlUtil.IDdeClient

registerConnectConfirmHandler

public void registerConnectConfirmHandler(DdemlUtil.ConnectConfirmHandler handler)

Specified by:

registerConnectConfirmHandler in interface DdemlUtil.IDdeClient

unregisterConnectConfirmHandler

public void unregisterConnectConfirmHandler(DdemlUtil.ConnectConfirmHandler handler)

Specified by:

unregisterConnectConfirmHandler in interface DdemlUtil.IDdeClient

registerDisconnectHandler

public void registerDisconnectHandler(DdemlUtil.DisconnectHandler handler)

Specified by:

registerDisconnectHandler in interface DdemlUtil.IDdeClient

registerErrorHandler

public void registerErrorHandler(DdemlUtil.ErrorHandler handler)

Specified by:

registerErrorHandler in interface DdemlUtil.IDdeClient

unregisterErrorHandler

public void unregisterErrorHandler(DdemlUtil.ErrorHandler handler)

Specified by:

unregisterErrorHandler in interface DdemlUtil.IDdeClient

registerRegisterHandler

public void registerRegisterHandler(DdemlUtil.RegisterHandler handler)

Specified by:

registerRegisterHandler in interface DdemlUtil.IDdeClient

unregisterRegisterHandler

public void unregisterRegisterHandler(DdemlUtil.RegisterHandler handler)

Specified by:

unregisterRegisterHandler in interface DdemlUtil.IDdeClient

registerXactCompleteHandler

public void registerXactCompleteHandler(DdemlUtil.XactCompleteHandler handler)

Specified by:

registerXactCompleteHandler in interface DdemlUtil.IDdeClient

unregisterXactCompleteHandler

public void unregisterXactCompleteHandler(DdemlUtil.XactCompleteHandler handler)

Specified by:

unregisterXactCompleteHandler in interface DdemlUtil.IDdeClient

registerUnregisterHandler

public void registerUnregisterHandler(DdemlUtil.UnregisterHandler handler)

Specified by:

registerUnregisterHandler in interface DdemlUtil.IDdeClient

unregisterUnregisterHandler

public void unregisterUnregisterHandler(DdemlUtil.UnregisterHandler handler)

Specified by:

unregisterUnregisterHandler in interface DdemlUtil.IDdeClient

registerMonitorHandler

public void registerMonitorHandler(DdemlUtil.MonitorHandler handler)

Specified by:

registerMonitorHandler in interface DdemlUtil.IDdeClient

unregisterMonitorHandler

public void unregisterMonitorHandler(DdemlUtil.MonitorHandler handler)

Specified by:

unregisterMonitorHandler in interface DdemlUtil.IDdeClient