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CLR.HDR
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1994-04-25
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/******************************************************************************
The Klipper Library, for CA-Clipper 5.x
Copyright (c), 1994, Wallace Information Systems Engineering
FUNCTION:
_Clr( nLine, nCol, nToLine, nToCol ) --> NIL
PARAMETERS:
nLine : box coordinates
nCol : "" ""
nToLine : "" ""
nToCol : "" ""
SHORT:
Clear a screen, region of a screen, line, or portion of a line.
DESCRIPTION:
_Clr() Clears the screen, a line, or a screen area, depending on how
the parameters are used.
One Parameter : nLine cleared
Two Parameters : nLine cleared from nCol to end of nLine
Three Parameters: Screen cleared from nLine,nCol to end of nToLine
Four Parameters : Screen cleared from nLine,nCol to nToLine,nToCol
No Parameters : Entire screen cleared
NOTE:
EXAMPLE:
_Clr() // screen cleared
_Clr(17) // line 17 cleared, rest of screen left
_Clr(5,10,15,70) // region of screen cleared inside box coordinates.
******************************************************************************/