Description: Print screen to a postscript printer
Mapped Command: PRINT IMAGE TO POSTSCRIPT
FUNCTION __PrintPostScript(landscape,reverse,hoffset,voffset,hscale,vscale,density)
   local mode := landscape + reverse
   hoffset    := if(hoffset == NIL,0,hoffset)
   voffset    := if(voffset == NIL,0,voffset)
   hscale     := if(hscale  == NIL,0,hscale )
   vscale     := if(vscale  == NIL,0,vscale )
   density    := if(density == NIL,0,density)
   printps(mode,hoffset,voffset,hscale,vscale,density)
RETURN(Void)