Basically, the purpose of this indexer is to return a point corresponding to a given row and column on the drawing surface. Follow these steps.
本质上，该索引器的目的是返回一个与绘制面上已知的行和列相对应的点。
Page coordinates refer to the coordinate system used by a drawing surface, such as a form or control.
页面坐标系是指绘图图面(如窗体或控件)使用的坐标系。
Page coordinates refer to the coordinate system used by a drawing surface, such as a form or a control.
页面坐标系是指绘图图面（如窗体或控件）使用的坐标系。
Page coordinates refer to the coordinate system used by a drawing surface, such as a form or a control.
页面坐标系是指绘图图面（如窗体或控件）使用的坐标系。
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