Returns a pointer to a CWnd object when given a handle to a window.
static CWnd* PASCAL FromHandlePermanent(
   HWND hWnd 
);
Parameters
- hWnd
 An HWND of a Windows window.
Return Value
A pointer to a CWnd object.
Remarks
If a CWnd object is not attached to the handle, NULL is returned.
This function, unlike FromHandle, does not create temporary objects.
Requirements
Header: afxwin.h