Question

I want to make auto logoff while closing the winform without timer access. How do I do that?

Answer 1

I do not really understand what do you mean by without timer access but you may run a process or a command while the form is closing using the FormClosing event.

If you would like to log off the user when the form is about to close, you may try to use the executable file shutdown.exe as a process and its argument /l

Example

public Form1()
{
    InitializeComponent();
    this.FormClosing += new FormClosingEventHandler(Form1_FormClosing); //Link FormClosing event to Form1_FormClosing
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    Process logoff = new Process(); //Initialize a new process
    ProcessStartInfo ProcessInfo = new ProcessStartInfo(); //Initialize a new ProcessStartInfo
    ProcessInfo.FileName = "shutdown.exe"; //Set the FileName of ProcessInfo
    ProcessInfo.Arguments = "/l"; //Log off, see 'shutdown.exe /?' for more information
    //ProcessInfo.WindowStyle = ProcessWindowStyle.Hidden; //Hide the process window (not required)
    logoff.StartInfo = ProcessInfo; //Associate ProcessInfo with logoff.StartInfo
    logoff.Start(); //Start the process
}

This will start the executable file shutdown.exe as a new process with its arguments /l which means log off the current user

Notice that: FormClosing is fired when the form is about to close. You may stop the form from closing by setting e.Cancel to true

^Example

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    e.Cancel = true; //Don't close the form
}

Thanks,

I hope you find this helpful 🙂