Sets an event key that changes the rate of play of an animation track.
D3DXEVENTHANDLE KeyTrackSpeed( [in] UINT Track, [in] FLOAT NewSpeed, [in] DOUBLE StartTime, [in] DOUBLE Duration, [in] D3DXTRANSITION_TYPE Transition );
Identifier of the track to modify.
New speed of the animation track.
Global time key. Specifies the global time when the change will take place.
Transition time, which specifies how long the smooth transition will take to complete.
Specifies the transition type used for transitioning between speeds. See D3DXTRANSITION_TYPE.
Event handle to the priority blend event. NULL is returned if one or more of the input parameters is invalid, or no free event is available.