Getting the prepared CD size / duration

Hi,
is there a way to get the CD Size (for data cd) and the CD duration ( for audio cd ) of NeroIsoTrack (data) and NeroAudioTracks (audio) ? and this before launching a drive.BurnIsoAudioxxx(); ?

the size is quite easy if neroCOM doesn’t provide the info.
but for the duration of CD, it is quite complicated to get an accurate duration with VBR mp3, …

a NeroAudioTracks.getTotalDuration() that use the track gap (2sec, or 0) for the computation could be very useful …

Thanx for help/support,
Jaycee.