VC响应鼠标消息的例子，希望对大家有用处！-Example of VC respond to mouse messages, I hope to be useful!

界面响应,用IDL开发的。如果用户在draw区域进行鼠标的左击、右击，键盘，以及滚轮的移动等操作，就会将这些全部显示在text内。-it is done by IDL.if one operate on the screen,it can write down what you have done.