Special thanks to Michael Kunz aka "Protogenes"
for helping me with 1001 tips and suggestions
to design the program code.
http://www-user.tu-chemnitz.de/~kunmi/?dbx_tree&lang=de

Thanks to the "UserinfoEx" programmers group
for the nice button class code.
http://code.google.com/p/userinfoex/

and special thanks to all beta-testers...