此程序是利用getmsg.dll截获notepad.exe 中WM_COMMAND消息的例子, 测试的时候请打开notepad.exe，并在其中输入内容，mpeg_play程序将收到相应的消息-use of this procedure is getmsg.dll were intercepted notepad.exe news WM_COMMAND example, testing the open the notepad.exe and in which input, mpeg_pla