MScrollStencilToCookie X1.w,Y1.w,Width.w,Height.w,X2.w,Y2.w[,SourceBitmapNum.w[,CustomOffsets.l]]; sten2cookie

Does the same as MScroll except that the source of the operation will be the
stencil of a chunky Bitmap, which will be copied to the cookie of a chunky Shape.