Description: So that a dialog box shows the background usually has two approaches: the use of picture controls, drawing in the WM_PAINT message. With picture controls is very simple, but functional features are not powerful, should not pull on the picture, such as Shanghai. In the drawing in WM_PAINT, relatively complex, but can do a lot of special treatment (such as on the picture la Shanghai, picture taking anti-, etc.). Then the following two methods on the outline.
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