手动改变制作窗体的大小。当用户去除窗体边框，自行设定窗体外观时，用户就不能对窗体的大小进行随意改变。本实例将实现如何改变无边窗体的大小-Produced manually change the size of the form. When you remove the window fr a me, form, set their own appearance, the user can not randomly change the size of the form. This example