>>>Is combo visible?
>>>If so, what happens if you make it invisible?
>>>
>>>BTW if the textbox is over the combo, and textbox is transparent, then Combo will have focus :-)
>>>
>>>Try this, just start typing :-)
>>
>>Textbox is on top of the combo (combo is a bit down below). I made combo invisible and yes, the textbox does have focus now. I'll try adding setting combo.visible to true after focus.
>
>Did this behavior change if you made combo visible and Textbox opaque?

Textbox is already opaque. Anyway, I was updating my reply:

UPDATE. Don't know why, but having combo invisible in design-time and setting it visible in Page.Activate right after textbox.SetFocus solved the problem. Thanks a lot, I was going in circles with this little problem.

I leave it this way - it's working!

I'm also thinking that could it be that they were too close to each other?