XTYP_CONNECT
A dynamic data exchange (DDE) server callback function receives the XTYP_CONNECT transaction when a client specifies a service name that the server supports and a topic name that is not NULL in a call to the DdeConnect function.
Parameters
uFmt
Not used.
hconv
Not used.
hsz1
Identifies the topic name.
hsz2
Identifies the service name.
hdata
Not used.
dwData1
Points to a CONVCONTEXT structure that contains context information for the conversation. If the client is not a Dynamic Data Exchange Management Library (DDEML) application, this parameter is 0.
dwData2
Specifies whether the client is the same application instance as the server. If the parameter is 1, the client is the same instance. If the parameter is 0, the client is a different instance.
Return Values
A server callback function should return TRUE to allow the client to establish a conversation on the specified service name and topic name pair, or the function should return FALSE to deny the conversation. If the callback function returns TRUE and a conversation is successfully established, the system passes the conversation handle to the server by issuing an XTYP_CONNECT_CONFIRM transaction to the server's callback function (unless the server specified the CBF_SKIP_CONNECT_CONFIRMS flag in the DdeInitialize function).
Remarks
This transaction is filtered if the server application specified the CBF_FAIL_CONNECTIONS flag in the DdeInitialize function.
A server cannot block this transaction type; the CBR_BLOCK return code is ignored.
See Also