why does this bring me an error-message:
lpDD LPDIRECTDRAW7 <>?
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.
Also, because you are trying to make lpDD an empty structure with <>, try ?
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.
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