You can turn on automatic downloading of bands in one of the following ways:

• Call the IDirectMusicPerformance::SetParam method for the GUID_PerfAutoDownload parameter. See Setting and Retrieving Global Parameters and the following example.
• Call the IDirectMusicSegment::SetParam or the IDirectMusicTrack::SetParam method for the GUID_Enable_Auto_Download parameter. See Setting and Retrieving Track Parameters.

In the following code example, the global parameter for the performance pPerf is set to enable automatic downloading of bands:

BOOL fAuto = TRUE;
pPerf->SetGlobalParam(GUID_PerfAutoDownload, &fAuto, sizeof(BOOL));

You can turn on automatic downloading of bands for the entire performance by using the DirectMusicPerformance.SetMasterAutoDownload method, or for an individual segment by using the DirectMusicSegment.SetAutoDownloadEnable method.