


Programmatically Determining Windows Workstation Lock Time
Knowing how long a Windows workstation has been locked is valuable in various applications. This article outlines several coding approaches to achieve this.
Method 1: C# and the SessionSwitch
Event
A highly effective method uses C#'s SessionSwitch
event handler. This event fires when the workstation's session status changes (lock, unlock, etc.). By tracking these events, you can precisely measure lock durations:
Microsoft.Win32.SystemEvents.SessionSwitch += new Microsoft.Win32.SessionSwitchEventHandler(SystemEvents_SessionSwitch); void SystemEvents_SessionSwitch(object sender, Microsoft.Win32.SessionSwitchEventArgs e) { if (e.Reason == SessionSwitchReason.SessionLock) { // Record the lock start time. } else if (e.Reason == SessionSwitchReason.SessionUnlock) { // Calculate and record the lock duration. } }
Method 2: Windows Service (Recommended)
For a self-contained and reliable solution, a Windows service offers advantages. The service can regularly check the lock status and maintain a log of lock durations. Note that this requires manual service installation and startup.
Further Reading:
- Microsoft Documentation:
SessionSwitchEventHandler
- Stack Overflow: Determining Workstation Lock Time
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