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tw_ScrXtr( scr, tp,lt, bm, rt, tN, lN, leng, wid )
----------------------------------------------------------------------------
Extract a region from a SAVESCREEN() variable. This function and
the next two are used in twSlide(), twMove() and twSize().
Arguments:
scr - 'C' SAVESCREEN() to extract from.
tp - 'N' Top of SAVESCREEN().
lt - 'N' Left of SAVESCREEN().
bm - 'N' Bottom of SAVESCREEN().
rt - 'N' Right of SAVESCREEN().
tN - 'N' Relative Top row to begin extract.
lN - 'N' Relative Left column to begin extract.
leng - 'N' Length of extracted region.
wid - 'N' Width of extracted region.
Return:
Clipper SAVESCREEN() variable.
Example:
RESTSCREEN( SBOTTOM, SLEFT, SBOTTOM, SRIGHT,;
tw_ScrXtr( WHIDDEN, STOP, SLEFT, SBOTTOM, SRIGHT,;
SBOTTOM, SLEFT, 1, SWIDTH + 1 ))
See Also:
tw_ScrApp()
tw_ScrDel()
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Written by Dave Pearson