Scales the picture in a window up or down.
Object.Zoom ( [p1 As Point], [p2 As Point] )
The two optional parameters p1 and p2 as Point gives the upper-left and lower-right corners of the rectangle you want to be magnified to the whole window. If only one input point is given, it becomes in the center of the window and the picture is magnifies about twice.
If no one input parameter is given, the picture is set to see the whole model.