This method retrieves the x-coordinate of the left edge of the control.
HRESULT get_Left( long *px );
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_Left, IASControl::GetBounds