IOCTL_VIDEO_UNMAP_VIDEO_MEMORY IOCTL

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.

Major Code

IRP_MJ_DEVICE_CONTROL

Input Buffer

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

Output Buffer

None

Status Block

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

Requirements

   
Header ntddvdeo.h

See Also

VIDEO_MEMORY

VideoPortUnmapMemory