how to check if the application is running

how to check if the application is running already.
i wanted to avoid running of multiple instances incidentally..

thanks

I guess you have to resort to the Windows "Process Status API".
Here is a sample of how to obtain information about all currently running processes:
Enumerating All Processes (Windows)

greeting
K-Duke

Thanks KDude

The most efficient way would be to create a MUTEX using win32 functions 'CreateMutex','OpenMutex', etc.