本例演示了怎样移动无标题栏的窗体的方法，程序中涉及到MouseDown、MouseMove、MouseUp三个鼠标事件的使用，我们可以从中学习到它们的用法。

-This example demonstrates how to move without the title bar of the form of methods, procedures relating to the MouseDown, MouseMove, MouseUp events of three mouse use, we can learn to use them.