Video compression drivers are listed in the [drivers] section of the SYSTEM.INI file. Driver entries have the form:
VIDC.FOURCC=driver_filename
The VIDC key word identifies the entry as a video compression or decompression driver. The FOURCC portion is typically the four-character code used to identify the driver but it is not restricted to it. (This entry must have one to four characters and a period "."separates it from the VIDC keyword.) The driver_filename portion of the entry is the filename of the driver.
Drivers can use an OEMSETUP.INF to install this entry.
When ICM locates a driver, it first uses the driver entry with the four-character code matching the four-character code specified by the application. If that driver is not suitable, ICM ignores the four-character code in the entry and will try other VIDC entries until it finds a suitable driver.