Use settimer to perform periodic operations without a window

How to Use the settimer () function in a thread environment without a window

Key point: The getmessage (dispatchmessage) must be in the same thread as the settimer function.

# Include <iostream> # Include <Stdio. h> # Include <Windows. h> # Define ID _ timer 100 Void  Callback timerproc (hwnd, uint umsg, uint_ptr idevent, DWORD dwtime) {systemtime st; getlocaltime ( & St); printf (  "  % 2D: % 2D: % 2D. % 3d hello! \ N "  , St. whour, st. wminute, st. wsecond, st. wmilliseconds );}  Int Main ( Int Argc, Char * Argv []) {  Int Iret = settimer (null, idt_timer, 1000  , (Timerproc); MSG;  While ( 1  ) {Getmessage ( & MSG, null, 0 ,0  ); Dispatchmessage ( & MSG );}  Return   0  ;} 

Generally, a thread system without a window does not specify a message queue for it. To stimulate a message queue, you can use postthreadmessage to send it to your own thread (getcurrentthreadid ()).

You can also create a short pattern loop by yourself. Using getmessage (...) can also stimulate the generation of message queues.

See:

Http://topic.csdn.net/t/20040607/14/3070354.html

http://hi.baidu.com/guangbinw/blog/item/b0818afbc7364760024f560a.html