The same happened with .NET usercontrols hosted in the Microsoft shim
control for toolwindows. I don´t know if it is a bug or not. If I remember
correctly, I found a workaround by code using the SendToBack / BringToFront
method of each control in the proper order.

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Carlos J. Quintero
The MZ-Tools all-in-one add-in, now for .NET: http://www.mztools.com
> Hellou again MS VIPs ;)
>
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> PS: Does Microsoft need some extra beta testers?
> (I'm finishing my studies next year ;))