hello

i am having some problems passing some UDT via con from C++ to VB in an SAFEARRAY.
there allready exists a thread describing how to do this but when i try to compile the code i get an error.

here the code in the idl file:

struct tagFGrid_t
{
    double Easting;
    double Northing;
    double Height;
};
typedef
[
    uuid(31286171-D2F8-11d5-9B78-00B0D078CA0B),
    helpstring("FGrid_t structure")
]
struct tagFGrid_t FGrid_t;
....

(in the interface)
[id(3), helpstring("Methode test1")] HRESULT XSendManyStructs([out, retval] SAFEARRAY(struct tagFGrid_t) * psaProfile);

....
//==================

now the code in the .cpp file
STDMETHODIMP CStrSrvClass::XSendManyStructs(/*[out, retval] SAFEARRAY(FGrid_t) */ LPSAFEARRAY * psaProfile)
{
    LPSAFEARRAY lpsaGrid = NULL;
    SAFEARRAYBOUND rgbounds = { 0, 1 };
    IRecordInfo* pRecInfo = NULL;
    HRESULT hr;

    hr = GetRecordInfoFromGuids(LIBID_STRUCTSRVLib, 1, 0, GetUserDefaultLCID(), UUID_FGrid_t, &pRecInfo);
    if (!SUCCEEDED(hr) || !pRecInfo)
    {
        return Error("FAnchoringDevice.get_Profile: failed to get UDT information for FCatenaryGridProfile_t", GUID_NULL, hr);
    }

    // Initialize number of elements of Array.
    rgbounds.cElements = 3;

    lpsaGrid = SafeArrayCreateEx(VT_RECORD, 1, &rgbounds, pRecInfo);
    pRecInfo->Release();

    // Do your stuff here to fill in the data of the SAFEARRAY

    *psaProfile = lpsaGrid;
    return S_OK;
}

//=============
when i compile the code i get the error:
D:\projects\temp\StructSrv\StrSrvClass.cpp(77) : error C2065: 'UUID_FGrid_t' : nichtdeklarierter Bezeichner
means "undeclared idetifyer"
i also tryed

hr = GetRecordInfoFromGuids(LIBID_STRUCTSRVLib, 1, 0, GetUserDefaultLCID(), __uuidof(FGrid_t), &pRecInfo);
but then i get the error:

D:\projects\temp\StructSrv\StrSrvClass.cpp(77) : error C2787: 'tagFGrid_t' : Keine GUID mit diesem Objekt verbunden
means " no GUID assosiated to object"


many thanks in advance

Forward declaration of the IID of the UDT in .cpp file should solve the
problem.

insert this code before the function implementations.

here I've just formated the IID you associated with your UDT
in your IDL file.

Regards

Ankur Verma
.Net and C++ Specialist
Wiley Tech Support

hello thanks for your answer. i will try this.
i did also solve the basic problem: i was using the wrong idl compiler
(version 5.01....) after switching to VC7 everything works great now. not with your solution but with __uuidof(vartype)

thanks

ps: there will be some more questions on com coming from me in the next time :) hope to get answers that fast againe

Hello

Please post your complete IDL file here.
I have the same problem even if I compiled with VS.NET 2003 compiler.

Thanks in advance.