// 产生支持位图区域 ( bitmap region ) 控件 public static void CreateControlRegion(Control control, bitmap bitmap)
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The pen, brush, bitmap, palette, region, and path associated with a DC are referred to as its graphic objects. The following attributes are associated with each of these objects.
与DC相联系的画笔，笔刷，调色板，区域和路径被称为图形对象，以下属性与每个对象相关联。
Updates the pixels in the specified region of the bitmap.
更新指定之点阵图区域中的像素。
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