.NET WinForms - How to listen to events for system LogOff, User Locked, Hibernate Started and System resumed?

I want to listen to events in my windows forms .NET application for the following sy开发者_JAVA技巧stem wide events :

Log Off Lock Windows Hibernate Started Sleep Started System Resumed

Are these possible?

Thanks

You need to look WMI (Windows media instrumentation). You would need to create event watchers for the above mentioned events.

http://msdn.microsoft.com/en-us/library/ms257340%28VS.80%29.aspx

Useful links:

Get Log off event from system

How to create a WMI Event Watcher for a user logoff event?

http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/0c1bded8-0cce-4260-bd28-4b4ffce0d27d

http://www.aspfree.com/c/a/VB.NET/WMI-Programming-with-Visual-BasicNET-Trapping-System-Events/1/

As suggested above, you can use the WMI to trap events.
I'm adding some code sample I wrote few years back (hope it will still work since it was written on VS2010 With .Net3.5)

Here's a class that gathers all the events

Imports Microsoft.Win32
Imports System.Windows.Forms

Public Class PowerMessageFilter
    Implements IMessageFilter
    Const WM_POWERBROADCAST As Integer = &H218
    Const PBT_APMSUSPEND As Integer = &H4
    Const PBT_APMSTANDBY As Integer = &H5
    Const PBT_APMRESUMESUSPEND As Integer = &H7
    Const PBT_APMRESUMESTANDBY As Integer = &H8

   Protected Sub reportpowerchange(ByVal reason As Integer)
       Dim report As String = String.Empty
       Select Case (reason)
           Case PBT_APMSUSPEND
               report = "system is suspending operation "
               suspend_service()
               Exit Select
           Case PBT_APMSTANDBY
               report = "system is standing by "
               suspend_service()
               Exit Select
           Case PBT_APMRESUMESUSPEND
               report = "operation resuming after suspension."
               suspend_service()
               Exit Select
           Case PBT_APMRESUMESTANDBY
               report = "operation resuming after stand by."
               suspend_service()
           Exit Select
       End Select
   End Sub

   Public Function PreFilterMessage(ByRef m As Message) As Boolean Implements IMessageFilter.PreFilterMessage
       If WM_POWERBROADCAST = m.Msg Then
           Console.Out.WriteLine("Power Broadcast recieved.")
           Dim reason As Integer = m.WParam.ToInt32()
           reportpowerchange(reason)
       End If
       Return False
   End Function

   Private Sub suspend_service()
      ' Your suspend code
   End Sub
End Class

Now, for the listener, I had a Win32 service that ran in the background and did the listening work

Dim Filter As New PowerMessageFilter 'The Standby/Hibernation Filter catch;
Application.AddMessageFilter(Filter)

I sorry that I don't have any references for the sites I've taken the examples from, I guess it was probably from the MSDN links above.

Hope it can help,
Liron