A shared memory object would work. Le 13 mai 2010 20:35, "Jay Chadderwala" <jay.chadderwala@xxxxxxxxx> a écrit : Hello Seniors, I am understanding system effects APO for vista and windows 7 in order to provide custom effect. I have develop custom GUI to display effects parameters. custom post rendered GFX sAPO prepares such parameters continously. If GUI is displayed it should reflect such parameters. My question is How can I develop communication between sAPO and standalone GUI? Thanks in advance. JC