ThisDrawing.ActiveLayout.PlotType = acWindow不对?解决方法

ThisDrawing.ActiveLayout.PlotType acWindow不对?为什么我这样写会提示“输入无效”?范例里面都有这种写

ThisDrawing.ActiveLayout.PlotType = acWindow不对?
为什么我这样写会提示“输入无效”?

范例里面都有这种写法的

[解决办法]
ThisDrawing.ActiveLayout.SetWindowToPlot LowerLeft, UpperRight
ThisDrawing.ActiveLayout.PlotType = acWindow