DirectDraw Hardware Interface Support on Windows NT

The following table lists the DirectDraw hardware interface functions that are supported on Windows NT:

Function Name	Description
Blt	Performs a bit-block transfer.
CanCreateSurface	Queries whether the driver can support a surface that is different from the primary surface.
CreateSurface	Creates a DirectDraw surface object.
DestroySurface	Destroys a DirectDraw surface object.
DrvDisableDirectDraw	DDI routine that disables the hardware for DirectDraw use.
DrvEnableDirectDraw	DDI routine that enables the hardware for DirectDraw use.
DrvGetDirectDrawInfo	DDI routine that gets the capabilities of the graphics hardware.
Flip	Allows driver to perform multi-buffering.
GetBltStatus	Queries the driver for its blt status.
GetFlipStatus	Queries the driver for its flip status.
Lock	Provides access to block of memory associated with a surface.
MapMemory	Maps or unmaps application-modifiable portionsn of the frame buffer into or from user-mode address space.
SetColorKey	Sets the color key value.
SetOverlayPosition	Sets the position for an overlay.
Unlock	Releases the lock held on a block of memory.
UpdateOverlay	Repositions or modifies the visual attributes of an overlay surface.
WaitForVerticalBlank	Returns the vertical blank status of the device.