The SetMessageExtraInfo function sets the extra message information for the current thread. Extra message information is an application- or driver-defined 32-bit value associated with the current thread's message queue. An application can use the GetMessageExtraInfo function to retrieve a thread's extra message information.
LPARAM SetMessageExtraInfo(
| LPARAM lParam | // application-defined 32-bit value |
| ); |
Parameters
lParam
Specifies the 32-bit value to associate with the current thread.
Return Values
The return value is the previous 32-bit value.
See Also