About error MIDL2337 : unsatisfied forward declaration

[ÂËÉ«¾µ]

in my idl file, i define a user-define data type as bollow:
typedef struct RasterFileHeade r
{
DWORD dwVersion;
LONG nDataOffset;
LONG nBandCount;
LONG nWidth;
LONG nHeight;
enum PixelDataTypeEn um ePDType; // it's a enum type import from another
tlb by importlib(...)
enum ImageModeEnum eImageMode; // it's a enum type import from another
tlb by importlib(...)
LONG nTileWidth;
LONG nTileHeight;
double dResolutionX;
double dResolutionY;
double dOrgX;
double dOrgY;
double dDPIX;
double dDPIY;
double dInvalidValue;
LONG nReserve1;
LONG nReserve2;
LONG nReserve3;
} RasterFileHeade r;

when complied, it comes to the error:"error MIDL2337 : unsatisfied forward
declaration".

i has found out that

[ÂËÉ«¾µ]

i has found out that

when i comment the above two enum data type
// enum PixelDataTypeEn um ePDType;
// enum ImageModeEnum eImageMode;

then compile it again, it works without errors.

Is there anybody tell me why?

thanks!
colorfilter

[Alex Buell]

On Wed, 6 Dec 2006 17:27:58 +0800, I waved a wand and this message
magically appears in front of __É«__:

when i comment the above two enum data type
// enum PixelDataTypeEn um ePDType;
// enum ImageModeEnum eImageMode;

You need to give the values for the enumeration, i.e., enum
PixelDataTypeEn um { 8bit, 16bit, 24bit }, or include the definitions
for ePDType and eImageMode from elsewhere.

--
http://www.munted.org.uk

You've been eating the cat food again, haven't you?

[benben]

ÂËÉ«¾µ wrote:

in my idl file, i define a user-define data type as bollow:
typedef struct RasterFileHeade r
{
DWORD dwVersion;
LONG nDataOffset;
LONG nBandCount;
LONG nWidth;
LONG nHeight;
enum PixelDataTypeEn um ePDType; // it's a enum type import from another
tlb by importlib(...)
enum ImageModeEnum eImageMode; // it's a enum type import from another
tlb by importlib(...)
LONG nTileWidth;
LONG nTileHeight;
double dResolutionX;
double dResolutionY;
double dOrgX;
double dOrgY;
double dDPIX;
double dDPIY;
double dInvalidValue;
LONG nReserve1;
LONG nReserve2;
LONG nReserve3;
} RasterFileHeade r;

when complied, it comes to the error:"error MIDL2337 : unsatisfied forward
declaration".

i has found out that

Judging the error name it seems that the above is MIDL code not C++, or
you are compiling with a wrong compiler. But, that is just my guess so I
can be wrong.

Ben