>How can I obtain the handle (hWnd) of a textbox or editbox?
>

Native VFP textbox and editbox controls do not have their own hWnds - they're user-rendered based on the hWnd of their container. You may want to use an ActiveX textbox/editbox instead of the natie VFP control classes, or with VFP7, might want to use the IAccessible interface tohandle the VFP controls - all VFP controls expose an IAccessible interface so that VFP 7 deliver MS Accessibility support.