MShapeClip ShapeNumber.w[,X.w,Y.w,Width.w,Height.w][,Active] ; Active=On/Off. Define Shape's clip window

Specifies the position (X,Y) and size (WidthxHeight) of the clip window to be
used for the specified chunky Shape object. Clipping may also be turned On or Off
using the additional `active' parameter. The window should be fully within the
limits of the Shape's graphic and the Width should be a multiple of 4.