Passing a value to another controller

http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/5368%3Fpage%3Dlast%26x-maxdepth%3D0
http://help.sap.com/saphelp_nw70/helpdata/en/cb/40193c45f9fa13e10000000a114084/content.htm

http://forums.sdn.sap.com/message.jspa?messageID=5639015
https://forums.sdn.sap.com/message.jspa?messageID=5963473