void 
OpenSteer::OpenSteerDemo::selectNextPlugIn (void)
{
    closeSelectedPlugIn ();
    selectedPlugIn = selectedPlugIn->next ();
    openSelectedPlugIn ();
}
void 
	OpenSteer::OpenSteerDemo::selectNextPlugIn (void)
{
	closeSelectedPlugIn ();
	OpenSteer::Plugin::selectPlugin( OpenSteer::Plugin::getSelectedPlugin()->next () );
	openSelectedPlugIn ();
}