For all pen styles except PS_ INSIDEFRAME, if the pen used to draw the outline is greater than1 pixel wide, then the pen is centered on the border so that part of the line can be outside the bounding box.

• 对于除ps_NSIDEFRAME之外的所有画笔风格，如果用来绘制轮廓的画笔比1像素宽度更大，那么画笔是在边界中心，以便线的局部可以在边界框之外。