public InputTracker(EventHandler <InputChangedEventArgs> changed)
{
var handler = changed;
if (handler != null)
{
Changed += handler;
}
disposed = false;
timerLock = new object();
timer = new Timer {
AutoReset = true, Enabled = false
};
timer.Elapsed += timer_Elapsed;
initialInfo = InputInfo.Create();
actualInfo = (InputInfo)initialInfo.Clone();
}