How can I put a resource dialog onto a CMDIChildWnd?

[Sasi Zo]

I have a CMDIChildWnd. I'd like to put a dialog (made with resource editor) onto this CMDIChildWnd. I can't use AppWizard because I programme an ARX (~ AutoCAD DLL) file. I try CFormView, but it doesn't work. Certainly, I do it wrong.
Can you tell me that how to implement this?
Thanks.