Video compression and decompression drivers can use an entry in the [Installable Compressors] section of the SYSTEM.INI file for loading and configuring the driver. Identify your driver in the [drivers] section if you want to use the Multimedia option of the Control Panel to install or configure it. Identify your driver in the [Installable Compressors] section if you want to use a custom-installation application. If you use a custom-installation application, it should update the [Installable Compressors] section when your driver is installed or removed.
Video compression and decompression drivers are identified by the keyname VIDC., followed by its four-character code identifier. For example, the following [Installable Compressors] section of SYSTEM.INI identifies one video compression and decompression driver:
[Installable Compressors]
VIDC.SAMP = ICSAMPLE.DRV
SAMP is the four-character code identifier of the compressor. This driver has a file name of ICSAMPLE.DRV.
The four-character code identifier must be unique. If you want to create a new four-character code identifier, register it with Microsoft to set up a standard definition and avoid any conflicts with other codes that might be defined. To register a code for a compression and decompression driver, request a Multimedia Developer Registration Kit from the following group:
| Microsoft Corporation |
| Advanced Consumer Technology Group |
| Product Marketing |
| One Microsoft Way |
| Redmond, WA 98052-6399 |
For more information about four-character codes, see the Microsoft Windows Programmer's Reference.