hpux man page for xsubtractregion

XSubtractRegion()														 XSubtractRegion()

Name
  XSubtractRegion - subtract one region from another.

Synopsis
  XSubtractRegion(sra, srb, dr_return)
	Region sra, srb;
	Region dr_return;

Arguments
  sra	    Specify the two regions in which you want to perform the computation.
  srb

  dr_return Returns the result of the computation.

Description
  XSubtractRegion() calculates the difference between the two regions specified (sra - srb) and puts the result in dr_return.

  This function returns a region which contains all parts of sra that are not also in srb.

  For more information on regions, see Volume One, Chapter 6, Drawing Graphics and Text.

Structures
  Region is a pointer to an opaque structure type.

See Also
  XClipBox(),  XCreateRegion(),  XDestroyRegion(),  XEmptyRegion(),  XEqualRegion(),  XIntersectRegion(),  XOffsetRegion(), XPointInRegion(),
  XPolygonRegion(), XRectInRegion(), XSetRegion(), XShrinkRegion(), XUnionRectWithRegion(), XUnionRegion(), XXorRegion().

Xlib - Regions															 XSubtractRegion()