>the click event of "Add" again, at this point is when I receive
>>the error.
>
>I think therein lies your problem, Luis. When you call the cmdAdd.Click() from the Valid(), you are, in effect, issuing a SetFocus() from within a Valid().
>
>Maybe you need to offload some of this processing from the controls to form methods.

Thanks for your answer Steve, I need the SetFocus() in the click event of my
"Add". I don't understand why I can not check if the control
already has the Focus.
Why the ActiveControl property doesn't work?