Window
handle.
NULL
The message is posted into the queue associated
with the current thread. When the message is received by using the WinGetMsg
or WinPeekMsg functions, the parameter
of the QMSG structure is NULL.
Other
ulMsgid (ULONG) - input
mpParam1 (MPARAM) - input
mpParam2 (MPARAM) - input
rc (BOOL) - returns