MSMaskScrollShape X1.w,Y1.w,Width.w,Height.w,X2.w,Y2.w[,SourceShapeNum.w] ; Cookie-Copy sh2sh and ck2ck

Does the same as MSMaskScroll except with regards to chunky Shapes. The Shape's
graphic and cookie are mask-copied to the destination Shape's graphic and cookie,
or the Shape's graphic is mask-cut `behind' the cookie-protected areas of the
destination Shape's image.