>>Ouch,
>>
>>making statusbartext = space doesn't solve the problem of "opt". When I switch pages in a pageframe, on one page I see this dreadful message after I changed a value in the combobox on the first page and saved my changes. I do not want to use set message to in the interactivechange of the combo, because we're not calling dodefault() there.
>
>Have the combo a root class ?

Yes. I added set message to this.statusbartext in combo's lost focus. Now I see this message when I click on the tab of the page. In that case we have a question "Do you want to save changes?".

How can I find out from pageframe, if I'm switching pages?