>>>HI fabio,
>>>
>>>thank you for your reply . may problem is resolved :
>>>http://www.levelextreme.com/wconnect/wc.dll?2,15,585701
>>
>>This is not a perfect solution.
>>If another application create the "STARBASE" mutex your application don't start.
>
>I don't think there is a problem with CreateEvent solution also suggested in the thread.

The post has same problem of Mutex.

Cannot have the certainty that the object has been created by yours executable.

But CreateEvent is more complex and the solution is immediate, ...