How to discard or release mutex in labwindow CVI.

Hi,

How to  release mutex  in labwindow CVI.

I have one existing DLL . This DLL  using method 'CreateMutex(NULL, TRUE, "USBDriverRunning");' . 

We need  to create another dll , this DLL be  release Mutex   'USBDriverRunning'.  

Thanks

Mukesh Kumar