MDI Child Move

Hi Guys

Can anybody help me trying to detect in the Parent MDI form if one of it's child forms has moved?

I have overridden WinProc in the MDI parent and can catch the windows messages, but can't see one for child moved. I know that there is a WM_MOVE message, but I can't seem to get this to pass to the parent.

If possible I would like to invoke a method in the parent when any of the children move, as opposed to detecting the move in each child (working on a large application).

Many Thanks In Advance
Jwal