How to detect my application is idle in c#? [duplicate]

Question

Possible Duplicate:
Check if an application is idle for a time period and lock it

Suppose I have a Windows product developed with C#. Now a requirement comes that if that application running and idle and when user try to interact with that application again then a login screen come. How to detect that my applications is idle when it is running? Please guide me to complete the job.

Answer 1

1. Add a timer control to your application.
2. Subscribe to mouseover and keydown events - when they fire, reset the timer.
3. When the timer fires (ie mouse hasn't moved and key's haven't been pressed for x amount of time), lock the screen / prompt for login.