CODEWITHSUNDEEP
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Oscar Castiblanco
Oscar Castiblanco

Reputation: 1646

know if Windows user is active

In windows I can log in and switch of user without logging out. Like that I can have multiple users logged in but only one working. How can I know which of the users is currently working.

Upvotes: 1

Views: 849

Answers (2)

Oscar Castiblanco
Oscar Castiblanco

Reputation: 1646

Actually I found a very good example of microsoft in c# (Detect the Windows session state ).

They register to the system event "SessionSwitch"

SystemEvents.SessionSwitch += new SessionSwitchEventHandler(SystemEvents_SessionSwitch);

void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e){
...
}

it needs a dependency in Win32

using Microsoft.Win32;

I tried and it work very good and relatively easy.

Upvotes: 2

Frédéric Hamidi
Frédéric Hamidi

Reputation: 262919

To my knowledge, the .NET framework does not expose to managed code the API required to achieve this. You will have to p/invoke quite a few WINAPI functions and define at least one structure and some enums on the .NET side.

If you're willing to follow that path, you can:

  • Call WTSEnumerateSessions(), passing WTS_CURRENT_SERVER_HANDLE in the hServer argument,

  • Iterate over the returned WTS_SESSION_INFO structures and locate the one whose State member has the WTSActive and WTSConnected bits set (there should only be one in your case),

  • Pass the SessionId member of that structure to WTSQuerySessionInformation(), specifying WTSUserName in the WTSInfoClass argument,

  • Read the user name from the returned buffer,

  • Use WTSFreeMemory() to free the buffer and the array of WTS_SESSION_INFO structures.

As you can see, this isn't really trivial. Good luck.

Upvotes: 1

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