Windows lock/unlock (with code)

[chrisli]

Hi everyone,

i'm trying to Handle the Micosoft.Win32.SessionSwitch Event, so when Windows is going to be locked by the user, i will simply write a line to the console.When it's going to be unlocked, the same.

Here's the code:

    Sub Main()
        AddHandler Microsoft.Win32.SystemEvents.SessionSwitch,
_ SystemEvents_Sessionswitch()
        Console.ReadLine()
        RemoveHandler Microsoft.Win32.SystemEvents,
_ SystemEvents_Sessionswitch()
    End Sub
 
    Private Sub SystemEvents_Sessionswitch(ByVal sender As Object, 
_ ByVal e As Microsoft.Win32.SessionSwitchEventArgs)
        If e.Reason = Microsoft.Win32.SessionSwitchReason.SessionLock Then
            Console.WriteLine("locked at: " & DateTime.Now)
        End If
        If e.Reason = Microsoft.Win32.SessionSwitchReason.SessionUnlock Then
            Console.WriteLine("unlocked at: " & DateTime.Now)
        End If
    End Sub
 

My Problem is now, that the Add/Remove Handler wants to have the 2 arguments given.

Here's the code in C# again, here it works flawless, without the arguments given.

using Microsoft.Win32;
public class App
{
static void Main()
{
SystemEvents.SessionSwitch += SystemEvents_SessionSwitch;
Console.ReadLine(); 
SystemEvents.SessionSwitch -= SystemEvents_SessionSwitch;
}
 
static void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e)
{
if(e.Reason == SessionSwitchReason.SessionLock)
{
    Console.WriteLine("locked at {0}", DateTime.Now);
}
if(e.Reason == SessionSwitchReason.SessionUnlock)
{
    Console.WriteLine("unlocked at {0}", DateTime.Now);
}
}
}

Thank you and sorry for my bad englisch.

Chris

[chrisli]

Ok, i'm an idiot. :)

Here's the solution:

        AddHandler Microsoft.Win32.SystemEvents.SessionSwitch, _
 AddressOf SystemEvents_Sessionswitch
        Console.ReadLine()
        RemoveHandler Microsoft.Win32.SystemEvents.SessionSwitch, _
 AddressOf SystemEvents_Sessionswitch
 

The AddressOf was missing. :)

[abljalil]

i am using the "chrisli" code which is given in C# i made a dot net service i will work fine when i login the system and then start it will capture all the event .

The problem is that when i restart the system and login (it will not capture the logon event,lock,unlock) . if i restart the service it will work fine and capture all event like (logoff,logon,lock , unlock)

[Plater]

The C# code is a bit flawed.
Eventhandlers should be added like

SystemEvents.SessionSwitch += new SessionSwitchEventHandler(SystemEvents_SessionSwitch);
 

And removed with the -=

SystemEvents.SessionSwitch -= new SessionSwitchEventHandler(SystemEvents_SessionSwitch);
 

(There are other ways, but simply using += SystemEvents_SessionSwitch should be avoided)


Are you removing the eventhandler when you shouldn't be?

[abljalil]

i have done this but the code is running condition and work in service when i login the system and restart the service in this scenario it will work fine

but the problem is that when i restart the computer and logon,logof,lock,unlock it will not capture these event

[Plater]

And you are sure your service is running and not paused or busy?
Hmmm

[abljalil]

i have find the solution.the SystemEvent depend on TermService(Terminal Service) i set my service dependence on TermService now it will work fine