/// <summary>
/// Gets time in since last user input
/// </summary>
/// <returns></returns>
public static TimeSpan Duration()
{
uint idleTime = 0;
var lastInputInfo = new LASTINPUTINFO();
lastInputInfo.cbSize = (uint) Marshal.SizeOf(lastInputInfo);
lastInputInfo.dwTime = 0;
uint envTicks = (uint)Environment.TickCount;
if (GetLastInputInfo(ref lastInputInfo))
{
uint lastInputTick = lastInputInfo.dwTime;
idleTime = envTicks - lastInputTick;
}
return TimeSpan.FromMilliseconds(idleTime);
}
static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
