DD_NTCALLBACKS structure (ddrawint.h)
The DD_NTCALLBACKS structure contains entry pointers to Microsoft Windows 2000 and later Microsoft DirectDraw callback functions that a device driver supports.
Syntax
typedef struct _DD_NTCALLBACKS {
DWORD dwSize;
DWORD dwFlags;
PDD_FREEDRIVERMEMORY FreeDriverMemory;
PDD_SETEXCLUSIVEMODE SetExclusiveMode;
PDD_FLIPTOGDISURFACE FlipToGDISurface;
} DD_NTCALLBACKS, *PDD_NTCALLBACKS;
Members
dwSize
Specifies the size in bytes of this DD_NTCALLBACKS structure.
dwFlags
Indicates what Windows 2000 and later callback functions the driver has implemented. For every bit set in dwFlags, the driver must initialize the corresponding function pointer member of this structure. This member can be one or more of the following flags:
- DDHAL_NTCB32_FREEDRIVERMEMORY
- DDHAL_NTCB32_SETEXCLUSIVEMODE
- DDHAL_NTCB32_FLIPTOGDISURFACE
FreeDriverMemory
Points to the driver-supplied DdFreeDriverMemory callback.
SetExclusiveMode
Points to the driver-supplied DdSetExclusiveMode callback.
FlipToGDISurface
Points to the driver-supplied DdFlipToGDISurface callback.
Remarks
Entries that the display driver does not use should be set to NULL. The driver should initialize this structure when its DdGetDriverInfo function is called with the GUID_NTCallbacks GUID.
Requirements
| Requirement | Value |
|---|---|
| Header | ddrawint.h (include Winddi.h) |