From what Bonnie and you seem to say, I conclude that I must have done something wrong. Thanks for all the help.

>>>>Now why my approach of developing code in an instantiated grid and move and adapt it to the base class worked for CellValidating but not for CellEnter is one riddle I sitll have to live with ... I guess
>>>
>>>Probably because you remembered to wire up the delegate for the CellValidating event, but not for the CellEnter event.
>>>

>>>' You probably remembered this one
>>>AddHandler CellValidating, AddressOf grdbase_CellValidating
>>>' But not this one
>>>AddHandler CellEnter, AddressOf grdbase_CellEnter
>>>

>>>
>>Interestingly I did not need to addhandler CellValidating, because handles me.CellValidating worked. But handles me.CellEnter did not, that's why I asked my question in the first place.
>
>Hmm. Wasn't clear from your original post exactly what you had tried but that syntax should also have worked like so:

Public Sub HandleCellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) _
>    Handles Me.CellValidating
>End Sub
>
>Public Sub HandleCellEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) _
>    Handles Me.CellEnter
>End Sub

Maybe trying with the wrong parameters?