This method retrieves the height of a control.
HRESULT get_Height( long *pdy );
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::get_Bounds is implemented.
IASControl::put_Height, IASControl::GetBounds