IAccessibilityDockingServiceCallback::Undocked method (shobjidl.h)
Undocks the accessibility window so that it will not be automatically moved to its previous location.
HRESULT Undocked( UNDOCK_REASON undockReason );
Specifies the reason why the accessibility application's window was undocked.
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.