Saves the graphics state of the form.

保存窗体的图形状态。

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Restores the translated graphics state and fills a rectangle with a solid blue brush.

还原经过平移的图形状态并用纯蓝色画笔填充一个矩形。

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Restores the translated graphics state and fills a rectangle with a solid blue brush.

还原经过平移的图形状态并用纯蓝色画笔填充一个矩形。

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