"Interop Forms Toolkit 1.0"
I came across this sort of by accident. I'm not sure if a post has been made about it yet, so I thought I would pass along a few links. Maybe someone here will find them useful.
This one takes you to a Microsoft page that talks about a FREE toolkit that enables you to use VB.NET forms in your VB6 applications.
http://msdn.microsoft.com/vbasic/downloads/powerpacks/interopforms/default.aspx
This one takes you to an article at The Code Project describing a way to extend the Microsoft Toolkit to work with C#.
http://www.codeproject.com/useritems/VB6_-_C__Interop_Form.asp
"The early bird may get the worm, but the second mouse gets the cheese."