本程序将VC向导自动生成的矩形窗口框架,通过类的派生创建出一个非矩形的框架窗口-This program will VC wizard to automatically generate the rectangular window frame, by derived classes to create a non rectangular frame window

可以标记座位 进行平移 画连续的矩形(Seats can be marked for continuous rectangular painting)