I use BINDEVENTs for our base grid class. I bind to several events -- LostFocus is one. It is bound to Grid.ControlLostFocus().
In ControlLostFocus I have

WITH This
   AEVENTS(oEvents,0)
   IF VARTYPE(oEvents[1])=="O"
      oControl = oEvents[1]
      oColumn = oEvents[1].Parent
   ELSE
      oColumn  = NULL
      oControl = NULL
   ENDIF
   IF NOT ISNULL(m.oColumn) 
      IF oControl.BaseClass = 'Container'
            ControlField = xxx  && more stuff here.
      ELSE
            ControlField = xxx
      ENDIF   
    .ControlCursorObject.Valid(m.ControlField)
ENDWITH

where the ControlCursorObject is one of our cursorAdapter classes.
My point is you can intercept here and do different behaviors depending on the control object's name or controlSource, etc.

>Dear all,
>
>I am adding number of columns to the grid programatically and issue bindevent event to the valid method of thetextbox
>What will be the workaround if I used bindevent() to the Valid method to make it fire. as if there was no code in the native valid event it will not fire. This is according to the help on bindevent()..."Certain events such as When and Valid require code in the event for it to occur."
>
>Indeed when I try to put in one of the column.text1.valid "nodefault" the assign method fired. but how can i put the 'nodefault' if I add some column programatically.
>
>Thanks in advance.
>
>Regards,
>Ed