How do you make a windows form to pop after system lock in VB.net

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Posted 19-Aug-15 3:33am

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CHill60 19-Aug-15 9:43am

Not entirely clear ... are you trying to detect when someone is trying to lock their PC and replace the Windows functionality with your own?

Sergey Alexandrovich Kryukov 19-Aug-15 11:09am

I don't think so. You can always add some application-specific functionality just to the application process. I think the question and the reason for asking it are clear enough. Please see Solution 1.
—SA

CHill60 19-Aug-15 12:05pm

Fair enough - it was the "after" system lock that was confusing me. No where near enough information in the question what ever they meant!

Sergey Alexandrovich Kryukov 19-Aug-15 13:05pm

Yes, that's confusing, I agree. I the system is locked, no one will see the the popup. :-)
But the inquirer will quickly realize that trying to use the technique, which is all that really matters.
—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-08-19T05:06:00

Please use this class: https://msdn.microsoft.com/en-us/library/microsoft.win32.systemevents%28v=vs.110%29.aspx[^].

You will see that if you handle the event Microsoft.Win32.SystemEvents.SessionSwitch, two of the reasons for invocation of this event are Microsoft.Win32.SessionSwitchReason.SessionLock and Microsoft.Win32.SessionSwitchReason.SessionUnlock:
https://msdn.microsoft.com/en-us/library/microsoft.win32.systemevents.sessionswitch%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/microsoft.win32.sessionswitchreason%28v=vs.110%29.aspx[^].

—SA