Detect inactivity and cancel screensaver

Question

I am making a WPF C# program. For the next stage I want to create a message that appears on the screen after half an hour of inactivity. I define inactivity as no mouse movements and no keys pressed. I have two questions for this

1) How would I trigger the message to show after half an hour of inactivity?

2) How would I cancel the windows screensaver if it is running?

So far I have looked at:

• Block screensaver
• Making a screensaver
• Screensaver in Windows 8
• https://stackoverflow.com/questions/10912891/dynamically-configure-screensaver-application-content
• Interrupt an active screensaver programatically?
• http://www.codeproject.com/Articles/17067/Controlling-The-Screen-Saver-With-C

You will see that frustrating most results point to creating a windows/linux screensaver rather than helping with my goal which is creating code that triggers from inactivity like the windows screensaver does.

Answer 1

Try looking at this article on code project.

The trick was to search for "System Idle" instead of "Screen Saver Effect".

(Credit to Darin Dimitrov's answer)