| Platform SDK: DirectX |
When programming for DirectMusic composition, you will use a variety of files produced in a tool such as DirectMusic Producer. You load these elements into the application as COM objects and obtain interfaces to them. (See DirectMusic Loader.)
The following table summarizes the types of files that you will encounter.
The Class GUID is the value that you put in the guidClass member of the DMUS_OBJECTDESC structure when loading the object.
| Element | Class GUID | Interface | File type |
|---|---|---|---|
| Band | CLSID_DirectMusicBand | IDirectMusicBand | .bnd |
| DLS collection | CLSID_DirectMusicCollection | IDirectMusicCollection | .dls |
| Chord map | CLSID_DirectMusicChordMap | IDirectMusicChordMap | .cdm |
| Segment | CLSID_DirectMusicSegment | IDirectMusicSegment | .sgt |
| Style | CLSID_DirectMusicStyle | IDirectMusicStyle | .sty |
| Template | CLSID_DirectMusicSegment | IDirectMusicSegment | .tpl |
| Element | DirectMusicLoader method | Class | File type |
|---|---|---|---|
| Band | LoadBand | DirectMusicBand | .bnd |
| DLS collection | LoadCollection | DirectMusicCollection | .dls |
| Chord map | LoadChordMap | DirectMusicChordMap | .cdm |
| Segment | LoadSegment | DirectMusicSegment | .sgt |
| Style | LoadStyle | DirectMusicStyle | .sty |
| Template | LoadSegment | DirectMusicSegment | .tpl |
Note Bands can be authored as part of a style, in which case they are automatically loaded when the style is loaded. Similarly, styles and bands can be authored into a segment, in which case you do not need separate files for those elements.
Files can also contain references to other files. If a style contains a reference to a band, the band is automatically loaded when the style is, provided the loader can find the band file.