How to handle close event of PowerShell window if user clicks on Close('X') button

Question

I want to run some code before PowerShell 2.0 window is closed. For this I tried:

PS > register-engineevent PowerShell.Exiting -action {get-process | out-file c:

Answer 1

The unhandled exception occurs because garbage collection has already disposed your handler by the time the unmanaged method is called. You can get around that by storing it in a static field:

private static HandlerRoutine s_rou;

public static void SetHandler()
{
    if (s_rou == null)
    {
        s_rou = new HandlerRoutine(ConsoleCtrlCheck);
        SetConsoleCtrlHandler(s_rou, true);
    }
}

Answer 2

When you click the X to close you are closing the application hosting PowerShell. This application would need to handle the exit situation. I believe the default PS host is the Windows console which is obviously not doing what you need. You could host PowerShell in a custom host and handle the exit events. I'm on a Mac right now but maybe running under the PS ISE would handle this for you?

Answer 3

Unfortunately, you can't do this. The only time an exiting event will get called is if you type "exit" at the PowerShell prompt.

This is how I hook up my exiting event:

 $null = Register-EngineEvent -SourceIdentifier `
     ([System.Management.Automation.PsEngineEvent]::Exiting) -Action { # Put code to run here }