The WM_QUIT message indicates a request to terminate an application and is generated when the application calls the PostQuitMessage function. It causes the GetMessage function to return zero.
WM_QUIT
nExitCode = (int) wParam; // exit code
Parameters
nExitCode
Value of wParam. Specifies the exit code given in the PostQuitMessage function.
Return Values
This message does not have a return value, because it causes the message loop to terminate before the message is sent to the application's window procedure.
See Also