The IXCMSGC macro allows you to interract with the XCF signaling services by providing services that:

• Save a message or response into an XCF-managed storage area for later processing (REQUEST=SAVEMSG)
• Discard a saved message or response, cancel an incomplete message-out request, or discard a completed message-out request (REQUEST=DISCARDMSG)
• Request information about incomplete message-out requests, completed message-out requests that are pending notification, or messages that have been saved with IXCMSGC (REQUEST=QUERYMSG)
• Force a message to be immediately considered complete (REQUEST=COMPLETION)
• Allow a user routine to receive control to process a saved message or a completed message-out request (REQUEST=CALLEXIT).