Hi Qwark,
Have a look at this class definition:
**************************************************
*-- Class: grd_base (d:\cbproject\libs\base_cntrl.vcx)
*-- ParentClass: grid
*-- BaseClass: grid
*-- Time Stamp: 11/24/00 09:51:11 PM
*
#INCLUDE "d:\cbproject\include\app.h"
*
DEFINE CLASS grd_base AS grid
FontName = "MS Sans Serif"
DeleteMark = .F.
GridLines = 2
Height = 200
ReadOnly = .T.
RecordMark = .F.
Width = 320
GridLineColor = RGB(192,192,192)
*-- Stores te current record number of the record source.
rec_no = 0
Name = "grd_base"
*-- Indicates if highlighting should be.
lnohighlight = .F.
*-- Stores a logical indicating if the lockscreen should be used when scrolling.
PROTECTED luselockscreen
PROCEDURE BeforeRowColChange
LPARAMETERS nColIndex
LOCAL llRetVal
IF THIS.lUseLockScreen
THISFORM.LockScreen = .T.
ENDIF
ENDPROC
PROCEDURE Valid
LOCAL llRetVal
llRetVal = DODEFAULT()
IF llRetVal
THIS.lUseLockScreen = .F.
THISFORM.LOCKSCREEN = .F.
ENDIF
RETURN llRetVal
ENDPROC
PROCEDURE When
LOCAL llRetVal
llRetVal = DODEFAULT()
IF llRetVal
THIS.lUseLockScreen = .T.
THISFORM.LOCKSCREEN = .F.
ENDIF
RETURN llRetVal
ENDPROC
PROCEDURE Refresh
DODEFAULT()
THIS.rec_no = RECNO(THIS.RECORDSOURCE)
ENDPROC
PROCEDURE AfterRowColChange
LPARAMETERS nColIndex
LOCAL llRetVal
llRetVal = DODEFAULT(nColIndex)
IF llRetVal
THIS.rec_no = RECNO(THIS.RECORDSOURCE)
ENDIF
IF THIS.luseLockScreen
THISFORM.LOCKSCREEN = .F.
ENDIF
RETURN llRetVal
ENDPROC
PROCEDURE Init
LOCAL llRetVal, lnCounter
llRetVal = DODEFAULT()
IF llRetVal AND !(THIS.lNoHighLight)
THIS.SETALL("DynamicBackColor", "IIF(RECNO(THIS.RecordSource) = THIS.rec_no, 8388608, 16777215)", "Column"

THIS.SETALL("DynamicForeColor", "IIF(RECNO(THIS.RecordSource)= THIS.rec_no, 16777215, 0)", "Column"

IF THIS.COLUMNCOUNT > 0
FOR lnCounter = 1 TO THIS.COLUMNCOUNT
WITH THIS.COLUMNS[lnCounter]
.Text1.BACKCOLOR = 8388608
.Text1.FORECOLOR = 16777215
.Text1.DISABLEDFORECOLOR = 8421504
.Text1.DISABLEDBACKCOLOR = 16777215
ENDWITH
ENDFOR
ENDIF
ENDIF
RETURN llRetVal
ENDPROC
ENDDEFINE
*
*-- EndDefine: grd_base
**************************************************