在CODEGURU看到一个MDI CLIENT以位图为背景的例子，

受到启发，在DIALOG中相似地模仿了以下，效果很好。

主要要点是处理背景擦除消息时在DIALOG CLIENT区域画

位图-MDI CLIENT in CODEGURU see a photo background to place the example, be inspired, in imitation of similar DIALOG in the following, very good. The main point is that when dealing with background erase message area in the DIALOG CLIENT bitmap picture