>I would like to override (disable) the default behaviour on a CHECKBOX when the user presses ENTER and if toggles the VALUE. Ideas please ....
>
>TIA,
>Bill

Here's a way you might handle it.
The InterActiveChange could be done through ProgrammaticChange, of course, but it seems to better fit here--InteractiveChange normally fires when the user types.

#DEFINE ENTERKEY 13

LPARAMETERS nKeyCode, nShiftAltCtrl
DO CASE
CASE nKeyCode = ENTERKEY
   NODEFAULT
   KEYBOARD "{TAB}"
CASE INLIST(m.nKeyCode, 88, 120, 116, 84, 121, 89)
   * User typed x, X, T, or t.
   IF NOT THIS.Value
      THIS.Value = .T.
      THIS.InterActiveChange() && Depending on your ProgrammaticChange code.
   ENDIF
   NODEFAULT
CASE INLIST(m.nKeyCode, 102,70, 78, 110)
   * User typed F, f, n, or N.
   IF THIS.Value 
      THIS.Value = .F.
      THIS.InterActiveChange()
   ENDIF
   NODEFAULT
OTHERWISE
ENDCASE