Apparently, manually adding registry keys does the trick, although this is
not supported and you'll probably face a few issues (eventing ...)
http://www.ondotnet.com/pub/a/dotnet/2003/01/20/winformshosting.html
> Has anyone tried doing this :
> I developped a .NET Windows custom control, that I would like to insert in
> an Excel Sheet when pressing a Add-in CommandButton.
>
> I'm currently struggling with Excel Interop and OleObjects collection, hope
> I'm on th eright path ....