[solved]Notify if application already running

[decipher]

Hi, How to check if my application is running or not...When I click on the executable it should check weather the application is running..If its running it should show that close the running application message...I went through the following link..its showing DWORD,BOOL,HANDLE doesn't name a type.
Using OS Ubuntu 10.04
QT4
http://www.qtcentre.org/threads/14079-How-to-detect-that-first-instance-of-application-is-already-running
Help
Thanks

[high_flyer]

Read all the posts in that thread, and visit all the links in it, the answer you are looking for is there.

[decipher]

http://www.qtcentre.org/wiki/index.php?title=SingleApplication
used the above link working fine