I'm trying to implement a frame timer and I need to reset the stored time to the current time at the beginning of the loop. The problem is my update() and render() methods are not directly in line with getting input. More specifically, there is no while loop that says GetInput, Update, Render. I'm assuming the callback methods such as private void Window_MouseDown(object sender, MouseEventArgs e) get processed before rendering. If I do anything remotely complex in processing input (and I am) I definitely want to take that process time into account so where does the loop actually start?