MessageIdTypedef=WORD MessageId=0x1 SymbolicName=CAT_ONE Language=English Category #1 . MessageId= SymbolicName=CAT_TWO Language=English Category #2 . MessageIdTypedef=DWORD MessageId=0x100 Severity=Informational Facility=Application SymbolicName=MSG_ONE Language=English This is message #1. . MessageId= Severity=Warning Facility=Application SymbolicName=MSG_TWO Language=English Application %1 is about to exit. (The event data is the log handle which is about to be closed.) .