This method retrieves the y-coordinate of the top of the control.
HRESULT get_Top( long *py );
NOERROR indicates success. If an error occurs, the appropriate HRESULT value is returned.
This method must be implemented, but can return E_NOTIMPL. However, it should be fully implemented if IASControl::GetBounds is implemented.
IASControl::put_Top, IASControl::GetBounds