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CAPLOCK.C
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1991-08-16
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2KB
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75 lines
/*
* File......: CAPLOCK.C
* Author....: Ted Means
* Date......: $Date: 15 Aug 1991 23:08:30 $
* Revision..: $Revision: 1.3 $
* Log file..: $Logfile: E:/nanfor/src/caplock.c_v $
*
* This is an original work by Ted Means and is placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* $Log: E:/nanfor/src/caplock.c_v $
*
* Rev 1.3 15 Aug 1991 23:08:30 GLENN
* Forest Belt proofread/edited/cleaned up doc
*
* Rev 1.2 14 Jun 1991 19:53:38 GLENN
* Minor edit to file header
*
* Rev 1.1 27 May 1991 14:41:56 GLENN
* Added a parameter to turn CapLock on or off.
*
*
*
*/
/* $DOC$
* $FUNCNAME$
* FT_CAPLOCK()
* $CATEGORY$
* Keyboard/Mouse
* $ONELINER$
* Determine and optionally change the status of CapLock key
* $SYNTAX$
* FT_CAPLOCK([ <lNewSetting> ]) -> lCurrentSetting
* $ARGUMENTS$
* <lNewSetting> is optional and if supplied is the new setting
* for the CapLock key. Specify .T. to turn CapLock on, or .F. to
* turn it off.
* $RETURNS$
* .T. if CapLock is set, .F. if it isn't set. The value returned
* represents the setting in effect prior to any changes that might
* by made by <lNewSetting>.
* $DESCRIPTION$
* This function is useful if you need to know or set the status of the
* CapLock key for some reason.
* $EXAMPLES$
* IF FT_CAPLOCK()
* Qout( "CapLock is active" )
* ENDIF
* $SEEALSO$
* FT_ALT() FT_CTRL() FT_NUMLOCK() FT_PRTSCR() FT_SHIFT()
* $END$
*/
#include <extend.h>
#define status_byte (*(char *)(0x00000417))
CLIPPER FT_CAPLOCK(void)
{
_retl( (int) (status_byte & 0x40) );
if ( PCOUNT )
if ( _parl(1) )
status_byte = (status_byte | 0x40);
else
status_byte = (status_byte & 0xBF);
return;
}