Audio and video device drivers use the following header files to define functions, messages, data structures, error returns, and constants.
| Header file | Used for |
|---|---|
| MSVIDEO.H | Video-capture device drivers |
| MSVIDDRV.H | Video-capture device drivers and applications |
| COMPDDK.H | Video compression and decompression drivers |
| MSACM.H | Audio compression and decompression functions, structures, and constants |
| MSACMDRV.H | Functions, structures, and constants for writing audio compression or decompression drivers |
| MMREG.H | Registration database information, such as registration ID |
| MSACMDLG.H | Functions, structures, and constants for using the Audio Compression Manager (ACM) standard dialog box |
| MSACMDLG.DLG | The template for the ACM dialog box |