Requests the extension DLL's TIX version. The handler must set pMessage->lResult to the __TIXVER__ value that was in effect when the extension DLL was compiled. This message must be handled by all extension DLLs and in all session types, and is not allowed to fail.

Action scheduling

This message is sent during preflight checks when InstallMate builds the installer. It may be sent at any time, even prior to TIXMSG_INITIALIZE or after TIXMSG_TERMINATE. Clients should not rely on the presence of pMessage->lCookie or pMessage->pTixRuntime when handling this message.


Not used

Result code

pMessage->lResult must be set to __TIXVER__; it must also return this value as the return code from TixHandler.