XTYP_CONNECT_CONFIRM 
 A dynamic data exchange (DDE) server callback function receives the XTYP_CONNECT_CONFIRM transaction to confirm that a conversation has been established with a client and to provide the server with the conversation handle. The system sends this transaction as a result of a previous XTYP_CONNECT or XTYP_WILDCONNECT transaction.
This transaction is filtered if the server application specified the CBF_SKIP_CONNECT_CONFIRMS flag in the DdeInitialize function.
A server cannot block this transaction type; the CBR_BLOCK return code is ignored.
  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in ddeml.h.
Dynamic Data Exchange Management Library Overview, Dynamic Data Exchange Management Transactions, DdeConnect, DdeConnectList, DdeInitialize