WinForms in WPF via VS Designer?

Answer 1

Yes, you should use the WindowsFormsHost and then include the clr-namespace and add the components :

http://msdn.microsoft.com/en-us/library/system.windows.forms.integration.windowsformshost(VS.90).aspx

You can also do it by code by adding

Panel p = new Panel();
WindowsFormsHost wf = new WindowsFormsHost();
wf.Child = p;