程序是基于对话框，无标题栏，系统菜单，最小化框,最大化框，无边框....，程序初始化时，把整个桌面屏幕截图，保存下来，然后把对话框设置全屏顶层窗口，然后把保存下来的位图，在OnEraseBkgnd中把整个位图贴到对话框上，然后用像皮筋类选择截取范围，看起来就像操作屏幕一样 。-Procedure is based on the dialog box, and no title bar, system menu, minimize box, maximize the fr a me, no border ...., initialization procedure, the entire desktop screen shots, saved, and then the dialog box set the whole screen top-level window, and then save the bitmap, in OnEraseBkgnd in the whole bitmap paste it into the dialog box, and then used as the scope of the Interception of rubber band of choice, the screen looks like the same operation.