CurrentTime error when changed playbackrate

[winsys11]

Hi All,
I have an application where I watch video and note the time when certain events occur. I want to do this with sped up video as the events are rare and easily seen.

problem is, if I increase the playbackrate to say 3.0, the CurrentTime value does not stay in sync with the elapsed time. Neither does the CurrentFrame value when accessed during the Progress event.

Any ideas on how I can get an (reasonably) accurate elapsed time counter during greater than x1 playback?

Mark