Window myWindow = myWControl.getWindowBackOffice().getWindow();
myWindow.setAttribute("DTabs", myDTabsImpl);
//REVIEW:PB remove if back support is desired
myWindow.addListener(this);//to be able to report BACK / FORWARD / RELOAD
/*
* use getAttribute on i.e. Windows(ureq).getWindow(ureq) to retrieve this "service"
*/