>You may be thinking of MSKB#Q186123, which references the MS Coolbar. I must admit that the article came to mind to me as well. There is probably some relationship between the message handling of this and the MS Toolbar.

Yep. That's it. We have tried creating a simple ActiveX with containership and it has the same behavior. As soon as we have disabled the containership it started to behave "normally" (ActiveForm do not get reference to the ActiveX object).

Many thanks.