/// <summary>
/// Returns time since last user action, i.e. how long they've been idle
/// </summary>
/// <returns>User idle time in miliseconds</returns>
public static uint GetIdleTime()
{
var lastInPut = new LASTINPUTINFO();
lastInPut.cbSize = (uint)Marshal.SizeOf(lastInPut);
GetLastInputInfo(ref lastInPut);
return (uint)Environment.TickCount - lastInPut.dwTime;
}
private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);