## MMPM/2 Device Driver Reference

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### VCAI_EDCOLORKEY (81h) - Enable/Disable Transparent Color

Category:
VIDEO_IOCTL_CAT (140)
Function:
VCAI_EDCOLORKEY (81h)
Description:
Enable/Disable Transparent Color

Select an item:

    Description
    Parameter Packet Format
    Data Packet Format

This IOCtl enables video to show through a specific color determined by the transparent-color key when the overlay monitor is enabled. If color keying is not enabled and the monitor is enabled, video will show through even if the transparent color is not present.