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I have created one service for my vb6.0 application with user credentials. It is running background. But i manually click the exe from application folder,No need to create a new instance, need to open the already running service instance GUI window.

Can you please give me the solution for this?

Selva Kumar
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  • what you mean exactly with _"user credentials"_ ? if two users will log in, are they both allowed to start just one instance each of your "exe-as-service"? – deblocker Jul 11 '17 at 10:03
  • user credentials means local system credentials. – Selva Kumar Jul 11 '17 at 10:45
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    I think you will need to use the App.PrevInstance property to detect this. Some approaches then use Win32 API calls to look for the application window and bring it to the foreground. – StayOnTarget Jul 11 '17 at 13:33
  • Possible duplicate of [Prevent opening multiple instance of VB application](https://stackoverflow.com/questions/3468616/prevent-opening-multiple-instance-of-vb-application) – C-Pound Guru Jul 11 '17 at 14:16
  • @DaveInCaz: maybe this question is slightly different, because App. PrevInstance doesn't work across the user boundary, so it isn't useful at machine-level. Anyway, this question still remains unclear until further explanation... – deblocker Jul 14 '17 at 07:29

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