>>You can't use Infragistics or other third party controls. You said, "I can accomplish the exact same result with the controls that come out of the VS toolbox."
>>
>>Go forth and start building the functionality.
>
>Huh?? I'm already doing it!! I write my own controls when needed. I provide business apps that work just fine.

Great! I look forward to the data grouping grid that you've built. Let me know when it's ready.

>
>I ask my question again - what were you doing before WPF came along?? How did you address these limitations?

The same way everyone else does, a build/buy decision.

We can go round and round about this, but it comes down to the point I made some time ago. You don't really understand what WPF is capable of doing. You're trying to apply WPF to the Winforms you have now. It was Viv or Tc who said something like, "With Winforms you display data in a form. With WPF, you apply a display template to the data." WPF requires a different way of thinking.