Hi Nicholas

Thanks for the input. I did try your approach. But seeing that I'm not so
experienced in subclassing windows messages, I found a C# example of how to
do it on vbAccelerator.com
(http://www.vbaccelerator.com/home/NET/Code/Libraries/Windows_Messages/Subclassin
g_in__NET/article.asp).
It was actually almost precisely what i was looking for apart from one
thing: it was indeed in C#, and the current project I'm working on is VB.

So I converted the C# to VB and it went ok apart from one detail (as far as
I can tell - it compiled at least...):

It seems like I can get the hWnd as well as the Handle from
EnvDTE.MainWindow (even though they are not visible in the intellisense).
The problem is that both of these values are Integer, but my subclassing
routine requires a handle of the type IntPtr.

I tried this:
activateChange = New ActivationChangeSubclass(CType(myDTE.MainWindow.Handle,
IntPtr), Nothing, Me)

but It made the Add-In crash, so apparently it wasn't the right solution.
Same with:

activateChange = New ActivationChangeSubclass(CType(myDTE.MainWindow.HWnd,
IntPtr), Nothing, Me)

Any ideas about how I can do that?

Cheers,

Johnny J.