Gets the rate at which the clock's time is currently progressing, compared to real-world time.
Assembly: PresentationCore (in PresentationCore.dll)
A ClockController object's SpeedRatio property enables you to change the speed of a Clock without altering the SpeedRatio of the clock's Timeline. In the following example, a ClockController is used to interactively modify the SpeedRatio of a clock. The CurrentGlobalSpeedInvalidated event and the clock's property are used to display the clock's current global speed each time its interactive SpeedRatio is changed.