IOCTL_VIDEO_UNMAP_VIDEO_MEMORY control code

Releases a mapping between the virtual address space and the adapter's frame buffer and video RAM. Miniport drivers are required to support this nonmodal request.

Input Parameters

The VRP InputBuffer contains a VIDEO_MEMORY structure, specifying the previously mapped virtual base address to be released with VideoPortUnmapMemory.

Output Parameters

None

I/O Status Block

The miniport driver does not set the Information member of the STATUS_BLOCK structure.

Requirements

Header

Ntddvdeo.h (include Ntddvdeo.h)

See also

VIDEO_MEMORY
VideoPortUnmapMemory

 

 

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