Howto create custom control like spell checker? VC 6

[Irfan]

Hi,

I want to create a panel like spell checker when my button is clicked.
The panel that should be created at the right side of document. I want to
add my textbox, a dropdown, listview and tab control in it.
What type of object should I create this panel. How can Inspector help me
out to do this?
Please guide me a way to do this. I am creating my addin in Visual C++ 6.

Thanks,
-Irfan