Hi Gerald

>Switching focus in and out of the current control can have upredictable side effects if there is code in the when/valid/lostfocus/... event of the current control.

Okay now I understand.

>Dig in the class and find the appropriate place to put the container refresh call.

Will do.

>My theory for this behaviour is that the activeX is not aware of the new size of its parent container until the container is refreshed.
>Before this refresh, the control continue to paint itself in the same "region" of the form.

If I remember correctly I have seen the TV adjust appropriately before, but that was a long time back and may just be my imagination or I have made some changes that I do not remember.

Thanks.