Get notification on Ctrl+Alt+Del

I know there is no way to block or ignore ctrl+Alt+Del开发者_如何学编程 within a program. But thats not what I want. Is there a way to only be notified if it WAS pressed? No interaction required, only notification.

Thank you!

I'm not sure why you'd want to do this, and I have a suspicion there's probably a better and cleaner way to accomplish your ultimate goal, but...

Off the top of my head, I would run a timer in the background of your application, and each time the timer fires, check to see if the Ctrl , Alt , and Delete keys were pressed. To do that, you'll have to use GetAsyncKeyState from user32.dll. I'd give you a code sample, but I'm not sure what language you're using. Play around with the interval for the timer to see what it needs to be to balance performance, yet still work.

Doesn't seem that there is an easy way to get a SAS notification, all articles I've found dealt with replacing GINA.

You might want to take a look at these:

• Customizing GINA, Part 1
• Customizing GINA, Part 2
• C++ Q&A Typename, Disabling Keys in Windows XP with TrapKeys

If you only want to find out whether the user has locked his workstation, you should take a look at WTSRegisterSessionNotification in conjunction with WM_WTSESSION_CHANGE.