>>Can you exand a little on what you want to achieve?
>>
>>Design time support is a big subject. You could start from here:
>>http://msdn.microsoft.com/en-us/library/37899azc.aspx
>>
>>>can you write wizard to add controls to form designer like user wizards in VFP
>>>Rajesh
>
>What we did in VFP was writing a own form builder which would add controls to form at design through wizard interface and then do the fine tuning as reqd.
>This used to bring down the development time for normal forms and were able to integrate as per our framework.

Then it sounds as if a custom Add-In might be the way to go (not much experience of this personally I'm afraid). This outlines the process (but the actual example won't be much help in your case):
http://msdn.microsoft.com/en-us/magazine/cc301961.aspx
Low level MS Documentation here: http://msdn.microsoft.com/en-us/library/bb384241.aspx

HTH,
Viv