向其它程序的按钮发送单击消息，程序中还有向DATETIME控件发消息改变日期的方法和将鼠标移到按钮上的方法将窗口致前台的方法等-To other programs click the button to send the message, the program also to change the date DATETIME发消息control methods and the mouse button to move the method to the front window caused