| DirectX SDK | 
The DirectMusicPerformance.GetChordmap method retrieves the chord map from the performance's control segment.
object.GetChordMap(mtTime As Long, _
    mtUntil As Long) As DirectMusicChordMap
If the method succeeds, it returns a DirectMusicChordmap object.
If the method fails, it raises an error, and Err.Number can be set to one of the following values:
| DMUS_E_NO_MASTER_CLOCK | 
| DMUS_E_GET_UNSUPPORTED | 
| DMUS_E_NOT_FOUND | 
| DMUS_E_TRACK_NOT_FOUND | 
Normally, the primary segment is the control segment. However, a secondary segment can be designated as a control segment when it is played. The object returned by the method can become invalid before the time returned in mtUntil if another control segment is cued.