I don't know how much this helps, but it may get you started or someone else can fill in the details.
All windows objects have a handle (hwnd). The trouble is that not all objects have a method that returns a handle unlike the Me.hwnd function.
I would guess though Windows has some API that can return the window's handle but I don't know it.
Hope this helps,
Rewdee
P.s. Why do you need to go so low-level to get the Windows handle. Is there an easier way to do what you want?