Hi Armin,

Check also Re: Only open application once Thread #585701 Message #585790.

>Thanks Sergey! Now we have more and more possible solutions ...
>
>Regards,
>Armin
>
>>>Nadya,
>>>
>>>>Check Windows API #12710
>>>
>>>Thanks for the link! Looks easy. Have you implemented that solution in your apps?
>>>
>>>Armin
>>
>>George Tasker posted his code in Re: Only open application once Thread #585701 Message #585856. You can substitute Mutex with WIndows Events.