>I checked all the keypress events and the textbox in the grid had keypress event implemented as follows:
>
>

>LPARAMETERS nKeyCode, nShiftAltCtrl
>SET STEP ON
>IF ((m.nKeyCode >= ASC("A") AND m.nKeyCode <= ASC("Z")) ;
>	OR (m.nKeyCode >= ASC("a") AND m.nKeyCode <= ASC("z")) ;
>	OR (m.nKeyCode >= ASC("0") AND m.nKeyCode <= ASC("9")) ;
>	OR INLIST(m.nKeyCode,ASC("'"),ASC("."),ASC("?"),ASC("!"), ;
>		ASC("*"),ASC(["]))) ;
>THEN
>
>	&& do something
>ELSE
>	DODEFAULT(m.nKeyCode, m.nShiftAltCtrl)
>ENDIF 	
>

>
>This doesn't stop arrow keys as you can see.

I wonder if the first time in this textbox has control and the DODEFAULT is not allowing the UpArrow to flow through. Is it just UpArrow giving problems? Can you try DnArrow?