Please try this.
Just put it into any dir and run it. It will run at the background and you should get an icon which shows the call is being forwarded from other number.
After you MAKE SURE it works fine on your phone(no crash or other problem...), you may add a link to \windows\startup to make it auto run at startup.
I build the application for my T7272 and it works fine. But I did not test for other platform. Feel free to report bugs.
Hello man, many thanks, it works perfect on "HTC Touch Cruise". I have 6 forwarded numbers to my mobile! Is there any chance to show from which number the call is diverted from?