question on a structur

[djtraumwelt]

why does this bring me an error-message:

Code Select Expand

lpDD LPDIRECTDRAW7 <>?

[AeroASM]

Most likely because LPDIRECTDRAW7 isn't defined anywhere in your include files.

You should not call it lpDD because lp means Long Pointer and this structure isn't a long ( 4 bytes) nor is it a pointer.

I would guess that the structure you want is IDirectDraw, try that.

[James Ladd]

Also, because you are trying to make lpDD an empty structure with <>, try ?

[AeroASM]

Theoretically <> and <?> are the same and they both work for me. Also, are you sure that it is in the data section? Please could you tell us the error message.

[MichaelW]

The name LPDIRECTDRAW7 is not defined anywhere in MASM32\include. It is defined in ddraw.h from the DX7DDK as:

typedef struct IDirectDraw7             FAR *LPDIRECTDRAW7;

The IDirectDraw7 definition is:

#if defined( _WIN32 ) && !defined( _NO_COM )
#undef INTERFACE
#define INTERFACE IDirectDraw7
DECLARE_INTERFACE_( IDirectDraw7, IUnknown )
{
    /*** IUnknown methods ***/
    STDMETHOD(QueryInterface) (THIS_ REFIID riid, LPVOID FAR * ppvObj) PURE;
    STDMETHOD_(ULONG,AddRef) (THIS)  PURE;
    STDMETHOD_(ULONG,Release) (THIS) PURE;
    /*** IDirectDraw methods ***/
    STDMETHOD(Compact)(THIS) PURE;
    STDMETHOD(CreateClipper)(THIS_ DWORD, LPDIRECTDRAWCLIPPER FAR*, IUnknown FAR * ) PURE;
    STDMETHOD(CreatePalette)(THIS_ DWORD, LPPALETTEENTRY, LPDIRECTDRAWPALETTE FAR*, IUnknown FAR * ) PURE;
    STDMETHOD(CreateSurface)(THIS_  LPDDSURFACEDESC2, LPDIRECTDRAWSURFACE7 FAR *, IUnknown FAR *) PURE;
    STDMETHOD(DuplicateSurface)( THIS_ LPDIRECTDRAWSURFACE7, LPDIRECTDRAWSURFACE7 FAR * ) PURE;
    STDMETHOD(EnumDisplayModes)( THIS_ DWORD, LPDDSURFACEDESC2, LPVOID, LPDDENUMMODESCALLBACK2 ) PURE;
    STDMETHOD(EnumSurfaces)(THIS_ DWORD, LPDDSURFACEDESC2, LPVOID,LPDDENUMSURFACESCALLBACK7 ) PURE;
    STDMETHOD(FlipToGDISurface)(THIS) PURE;
    STDMETHOD(GetCaps)( THIS_ LPDDCAPS, LPDDCAPS) PURE;
    STDMETHOD(GetDisplayMode)( THIS_ LPDDSURFACEDESC2) PURE;
    STDMETHOD(GetFourCCCodes)(THIS_  LPDWORD, LPDWORD ) PURE;
    STDMETHOD(GetGDISurface)(THIS_ LPDIRECTDRAWSURFACE7 FAR *) PURE;
    STDMETHOD(GetMonitorFrequency)(THIS_ LPDWORD) PURE;
    STDMETHOD(GetScanLine)(THIS_ LPDWORD) PURE;
    STDMETHOD(GetVerticalBlankStatus)(THIS_ LPBOOL ) PURE;
    STDMETHOD(Initialize)(THIS_ GUID FAR *) PURE;
    STDMETHOD(RestoreDisplayMode)(THIS) PURE;
    STDMETHOD(SetCooperativeLevel)(THIS_ HWND, DWORD) PURE;
    STDMETHOD(SetDisplayMode)(THIS_ DWORD, DWORD,DWORD, DWORD, DWORD) PURE;
    STDMETHOD(WaitForVerticalBlank)(THIS_ DWORD, HANDLE ) PURE;
    /*** Added in the v2 interface ***/
    STDMETHOD(GetAvailableVidMem)(THIS_ LPDDSCAPS2, LPDWORD, LPDWORD) PURE;
    /*** Added in the V4 Interface ***/
    STDMETHOD(GetSurfaceFromDC) (THIS_ HDC, LPDIRECTDRAWSURFACE7 *) PURE;
    STDMETHOD(RestoreAllSurfaces)(THIS) PURE;
    STDMETHOD(TestCooperativeLevel)(THIS) PURE;
    STDMETHOD(GetDeviceIdentifier)(THIS_ LPDDDEVICEIDENTIFIER2, DWORD ) PURE;
    STDMETHOD(StartModeTest)(THIS_ LPSIZE, DWORD, DWORD ) PURE;
    STDMETHOD(EvaluateMode)(THIS_ DWORD, DWORD * ) PURE;
};
#if !defined(__cplusplus) || defined(CINTERFACE)
#define IDirectDraw7_QueryInterface(p, a, b)         (p)->lpVtbl->QueryInterface(p, a, b)
#define IDirectDraw7_AddRef(p)                       (p)->lpVtbl->AddRef(p)
#define IDirectDraw7_Release(p)                      (p)->lpVtbl->Release(p)
#define IDirectDraw7_Compact(p)                      (p)->lpVtbl->Compact(p)
#define IDirectDraw7_CreateClipper(p, a, b, c)       (p)->lpVtbl->CreateClipper(p, a, b, c)
#define IDirectDraw7_CreatePalette(p, a, b, c, d)    (p)->lpVtbl->CreatePalette(p, a, b, c, d)
#define IDirectDraw7_CreateSurface(p, a, b, c)       (p)->lpVtbl->CreateSurface(p, a, b, c)
#define IDirectDraw7_DuplicateSurface(p, a, b)       (p)->lpVtbl->DuplicateSurface(p, a, b)
#define IDirectDraw7_EnumDisplayModes(p, a, b, c, d) (p)->lpVtbl->EnumDisplayModes(p, a, b, c, d)
#define IDirectDraw7_EnumSurfaces(p, a, b, c, d)     (p)->lpVtbl->EnumSurfaces(p, a, b, c, d)
#define IDirectDraw7_FlipToGDISurface(p)             (p)->lpVtbl->FlipToGDISurface(p)
#define IDirectDraw7_GetCaps(p, a, b)                (p)->lpVtbl->GetCaps(p, a, b)
#define IDirectDraw7_GetDisplayMode(p, a)            (p)->lpVtbl->GetDisplayMode(p, a)
#define IDirectDraw7_GetFourCCCodes(p, a, b)         (p)->lpVtbl->GetFourCCCodes(p, a, b)
#define IDirectDraw7_GetGDISurface(p, a)             (p)->lpVtbl->GetGDISurface(p, a)
#define IDirectDraw7_GetMonitorFrequency(p, a)       (p)->lpVtbl->GetMonitorFrequency(p, a)
#define IDirectDraw7_GetScanLine(p, a)               (p)->lpVtbl->GetScanLine(p, a)
#define IDirectDraw7_GetVerticalBlankStatus(p, a)    (p)->lpVtbl->GetVerticalBlankStatus(p, a)
#define IDirectDraw7_Initialize(p, a)                (p)->lpVtbl->Initialize(p, a)
#define IDirectDraw7_RestoreDisplayMode(p)           (p)->lpVtbl->RestoreDisplayMode(p)
#define IDirectDraw7_SetCooperativeLevel(p, a, b)    (p)->lpVtbl->SetCooperativeLevel(p, a, b)
#define IDirectDraw7_SetDisplayMode(p, a, b, c, d, e) (p)->lpVtbl->SetDisplayMode(p, a, b, c, d, e)
#define IDirectDraw7_WaitForVerticalBlank(p, a, b)   (p)->lpVtbl->WaitForVerticalBlank(p, a, b)
#define IDirectDraw7_GetAvailableVidMem(p, a, b, c)  (p)->lpVtbl->GetAvailableVidMem(p, a, b, c)
#define IDirectDraw7_GetSurfaceFromDC(p, a, b)       (p)->lpVtbl->GetSurfaceFromDC(p, a, b)
#define IDirectDraw7_RestoreAllSurfaces(p)           (p)->lpVtbl->RestoreAllSurfaces(p)
#define IDirectDraw7_TestCooperativeLevel(p)         (p)->lpVtbl->TestCooperativeLevel(p)
#define IDirectDraw7_GetDeviceIdentifier(p,a,b)      (p)->lpVtbl->GetDeviceIdentifier(p,a,b)
#define IDirectDraw7_StartModeTest(p,a,b,c)        (p)->lpVtbl->StartModeTest(p,a,b,c)
#define IDirectDraw7_EvaluateMode(p,a,b)           (p)->lpVtbl->EvaluateMode(p,a,b)
#else
#define IDirectDraw7_QueryInterface(p, a, b)         (p)->QueryInterface(a, b)
#define IDirectDraw7_AddRef(p)                       (p)->AddRef()
#define IDirectDraw7_Release(p)                      (p)->Release()
#define IDirectDraw7_Compact(p)                      (p)->Compact()
#define IDirectDraw7_CreateClipper(p, a, b, c)       (p)->CreateClipper(a, b, c)
#define IDirectDraw7_CreatePalette(p, a, b, c, d)    (p)->CreatePalette(a, b, c, d)
#define IDirectDraw7_CreateSurface(p, a, b, c)       (p)->CreateSurface(a, b, c)
#define IDirectDraw7_DuplicateSurface(p, a, b)       (p)->DuplicateSurface(a, b)
#define IDirectDraw7_EnumDisplayModes(p, a, b, c, d) (p)->EnumDisplayModes(a, b, c, d)
#define IDirectDraw7_EnumSurfaces(p, a, b, c, d)     (p)->EnumSurfaces(a, b, c, d)
#define IDirectDraw7_FlipToGDISurface(p)             (p)->FlipToGDISurface()
#define IDirectDraw7_GetCaps(p, a, b)                (p)->GetCaps(a, b)
#define IDirectDraw7_GetDisplayMode(p, a)            (p)->GetDisplayMode(a)
#define IDirectDraw7_GetFourCCCodes(p, a, b)         (p)->GetFourCCCodes(a, b)
#define IDirectDraw7_GetGDISurface(p, a)             (p)->GetGDISurface(a)
#define IDirectDraw7_GetMonitorFrequency(p, a)       (p)->GetMonitorFrequency(a)
#define IDirectDraw7_GetScanLine(p, a)               (p)->GetScanLine(a)
#define IDirectDraw7_GetVerticalBlankStatus(p, a)    (p)->GetVerticalBlankStatus(a)
#define IDirectDraw7_Initialize(p, a)                (p)->Initialize(a)
#define IDirectDraw7_RestoreDisplayMode(p)           (p)->RestoreDisplayMode()
#define IDirectDraw7_SetCooperativeLevel(p, a, b)    (p)->SetCooperativeLevel(a, b)
#define IDirectDraw7_SetDisplayMode(p, a, b, c, d, e) (p)->SetDisplayMode(a, b, c, d, e)
#define IDirectDraw7_WaitForVerticalBlank(p, a, b)   (p)->WaitForVerticalBlank(a, b)
#define IDirectDraw7_GetAvailableVidMem(p, a, b, c)  (p)->GetAvailableVidMem(a, b, c)
#define IDirectDraw7_GetSurfaceFromDC(p, a, b)       (p)->GetSurfaceFromDC(a, b)
#define IDirectDraw7_RestoreAllSurfaces(p)           (p)->RestoreAllSurfaces()
#define IDirectDraw7_TestCooperativeLevel(p)         (p)->TestCooperativeLevel()
#define IDirectDraw7_GetDeviceIdentifier(p,a,b)      (p)->GetDeviceIdentifier(a,b)
#define IDirectDraw7_StartModeTest(p,a,b,c)        (p)->lpVtbl->StartModeTest(a,b,c)
#define IDirectDraw7_EvaluateMode(p,a,b)           (p)->lpVtbl->EvaluateMode(a,b)
#endif

#endif