CLEAR GRAPHICS WINDOW

Description:
This command clears a specific area of the screen.

Syntax:
CLEAR GRAPHICS WINDOW FROM <Pos1_a>,<Pos1_b> TO <Pos2_a>,<Pos2_b>

Arguments:
<Pos1_a> is the upper left row screen coordinate from 0 to 24.
<Pos1_b> is the upper left column screen coordinate from 0 to 79.
<Pos2_a> is the lower right row screen coordinate from 0 to 24.
<Pos2_b> is the lower right column screen coordinate from 0 to 79.
[BEVEL] will clear an area that contains a beveled box which has
  dimensions slightly larger than the originally specified frame.

Example:
CLEAR GRAPHICS WINDOW FROM 10,10 TO 20,20 // clear a 10 by 10 window

         Purpose: Clear a window area
 Mapped Function: __ClearGWindow() contained in GLLIBR.PRG.
   dGE functions: clrwin()
   Other GL UDFs: __XDge(),__YDge()
System variables: None.
System constants: None.

See Also: