/doc/notes_on_COM_gu.cpp

#define _WIN32_DCOM

#include <stdio.h>

#include <wtypes.h>



#import "path\\mscorlib.tlb" no_namespace named_guids raw_interfaces_only



HRESULT InvokeStaticMember(BSTR typeName, BSTR memberName,

  BindingFlags memberType, SAFEARRAY* parameters, VARIANT* retVal)

{

  HRESULT hresult;

  IUnknown* pUnk = NULL;

  _Object* pObj = NULL;

  _Type* pType = NULL;

  _Type* pTypeOfType = NULL;

  _Type* pDesiredType = NULL;

  VARIANT typeNameParam;

  VARIANT getTypeRetVal;

  VARIANT nullObject;

  SAFEARRAY* psa;

  LONG index;

  BSTR getTypeName = SysAllocString(L"GetType");



  VariantInit(&typeNameParam);

  VariantInit(&getTypeRetVal);

  VariantInit(&nullObject);



  // Instantiate a dummy class just so we can get a System.Type instance

  hresult = CoCreateInstance(CLSID_Object, NULL,

    CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnk);

  if (FAILED(hresult)) goto cleanup;



  // Get the _Object interface so we can call GetType

  hresult = pUnk->QueryInterface(IID__Object, (void**)&pObj);

  if (FAILED(hresult)) goto cleanup;



  // Call _Object.GetType

  hresult = pObj->GetType(&pType);

  if (FAILED(hresult)) goto cleanup;



  // Call the instance Type.GetType method (inherited from Object)

  // in order to get the type for System.Type rather than the type for

  // System.Object

  hresult = pType->GetType(&pTypeOfType);

  if (FAILED(hresult)) goto cleanup;



  // Prepare a 1-element array containing the passed-in type name

  // to pass to the static Type.GetType method

  psa = SafeArrayCreateVector(VT_VARIANT, 0, 1);

  typeNameParam.vt = VT_BSTR;

  typeNameParam.bstrVal = typeName;

  index = 0;

  hresult = SafeArrayPutElement(psa, &index, &typeNameParam);

  if (FAILED(hresult)) goto cleanup;



  // Invoke the static Type.GetType method using reflection on the

  // type for System.Type in order to get the desired type

  nullObject.vt = VT_EMPTY;

  hresult = pTypeOfType->InvokeMember_3(getTypeName,

    (BindingFlags)(BindingFlags_InvokeMethod | BindingFlags_Public |

    BindingFlags_Static | BindingFlags_FlattenHierarchy), NULL,

    nullObject, psa, &getTypeRetVal);

  if (FAILED(hresult)) goto cleanup;



  // Get the _Type interface so we can call the static InvokeMember

  // method on the desired type to invoke the desired static member

  hresult = getTypeRetVal.punkVal->QueryInterface(IID__Type,

    (void**)&pDesiredType);

  if (FAILED(hresult)) goto cleanup;



  // Invoke the desired static member

  pDesiredType->InvokeMember_3(memberName, (BindingFlags)(memberType |

    BindingFlags_Public | BindingFlags_Static |

    BindingFlags_FlattenHierarchy), NULL, nullObject, parameters,

    retVal);

  if (FAILED(hresult)) goto cleanup;



cleanup:

  if (pUnk) pUnk->Release();

  if (pObj) pObj->Release();

  if (pType) pType->Release();

  if (pTypeOfType) pTypeOfType->Release();

  if (pDesiredType) pDesiredType->Release();

  if (getTypeName) SysFreeString(getTypeName);

  SafeArrayDestroy(psa);

  VariantClear(&typeNameParam);

  VariantClear(&getTypeRetVal);

  VariantClear(&nullObject);



  return hresult;

};



int main(int argc, char* argv[])

{

  HRESULT hresult;

  VARIANT retVal;

  _AppDomain* pDomain = NULL;

  BSTR typeName1, typeName2, memberName1, memberName2, directory;



  // Initialize COM

  hresult = CoInitializeEx(NULL, COINIT_MULTITHREADED);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot initialize COM: 0x%x\n", hresult);

    return -1;

  }



  VariantInit(&retVal);



  // ------------------------------------------

  // Example 1: Calling System.Console.ReadLine

  // ------------------------------------------



  typeName1 = SysAllocString(L"System.Console");

  memberName1 = SysAllocString(L"ReadLine");



  printf("Type in something followed by Enter: ");



  hresult = InvokeStaticMember(typeName1, memberName1,

    BindingFlags_InvokeMethod, NULL, &retVal);

  if (FAILED(hresult))

  {

    printf("ERROR: Invocation failed: 0x%x\n", hresult);

    return -1;

  }



  wprintf(L"You typed: '%s'\n", retVal.bstrVal);



  // --------------------------------------------------

  // Example 2: Calling System.AppDomain.CurrentDomain

  // --------------------------------------------------



  typeName2 = SysAllocString(L"System.AppDomain");

  memberName2 = SysAllocString(L"CurrentDomain");



  hresult = InvokeStaticMember(typeName2, memberName2,

    BindingFlags_GetProperty, NULL, &retVal);

  if (FAILED(hresult))

  {

    printf("ERROR: Invocation failed: 0x%x\n", hresult);

    return -1;

  }



  // Get the _AppDomain interface from the returned IUnknown pointer

  hresult = retVal.punkVal->QueryInterface(IID__AppDomain,

    (void**)&pDomain);

  if (FAILED(hresult))

  {

    printf("ERROR: Could not get _AppDomain interface pointer: 0x%x\n",

      hresult);

    return -1;

  }



  // Call the BaseDirectory property on the _AppDomain instance

  pDomain->get_BaseDirectory(&directory);

  wprintf(L"Base directory of the current domain: '%s'\n", directory);



  CoUninitialize();

  return 0;

};







#define _WIN32_DCOM

#include <stdio.h>

#include <wtypes.h>



// Reference the two necessary type libraries

#import "path\\mscoree.tlb" no_namespace named_guids raw_interfaces_only

#import "path\\mscorlib.tlb" no_namespace named_guids raw_interfaces_only



IUnknown* pUnk = NULL;

IUnknown* pUnk2 = NULL;

ICorRuntimeHost* pHost = NULL;

_AppDomain* pDomain = NULL;

_ObjectHandle* pHandle = NULL;

IDispatch* pDisp = NULL;



BSTR asmName;

BSTR typeName;

VARIANT arrayList;

VARIANT param;



void Cleanup()

{

  pHost->Stop();

  if (pUnk) pUnk->Release();

  if (pUnk2) pUnk2->Release();

  if (pDisp) pDisp->Release();

  if (pHandle) pHandle->Release();

  if (pDomain) pDomain->Release();

  if (pHost) pHost->Release();

  if (asmName) SysFreeString(asmName);

  if (typeName) SysFreeString(typeName);

  VariantClear(&param);

  VariantClear(&arrayList);

  CoUninitialize();

};



int main(int argc, char* argv[])

{

  HRESULT hresult;



  // Initialize COM

  hresult = CoInitializeEx(NULL, COINIT_MULTITHREADED);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot initialize COM: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Initialize the CLR

  hresult = CoCreateInstance(CLSID_CorRuntimeHost, NULL,

    CLSCTX_INPROC_SERVER, IID_IUnknown, (void **)&pUnk);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot create host object: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Get the ICorRuntimeHost interface

  hresult = pUnk->QueryInterface(IID_ICorRuntimeHost, (void**)&pHost);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot get ICorRuntimeHost interface pointer: 0x%x\n",

      hresult);

    Cleanup();

    return -1;

  }



  // Start the host

  hresult = pHost->Start();

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot start host: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Get the default domain

  hresult = pHost->GetDefaultDomain(&pUnk2);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot get default domain: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Get the _AppDomain interface

  hresult = pUnk2->QueryInterface(IID__AppDomain, (void**)&pDomain);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot get _AppDomain interface pointer: 0x%x\n",

      hresult);

    Cleanup();

    return -1;

  }



  // Strings for CreateInstance_3

  asmName = SysAllocString(L"mscorlib");

  typeName = SysAllocString(L"System.Collections.ArrayList");



  // Create a 1D array with one integer element

  SAFEARRAY* psa = SafeArrayCreateVector(VT_VARIANT, 0, 1);

  VariantInit(&param);

  param.vt = VT_I4;

  param.lVal = 128;

  LONG index = 0;



  hresult = SafeArrayPutElement(psa, &index, &param);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot set SAFEARRAY element: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Create an instance of ArrayList using a parameterized constructor

  hresult = pDomain->CreateInstance_3(asmName, typeName, VARIANT_TRUE,

    BindingFlags_Default, NULL, psa, NULL, NULL, NULL, &pHandle);

  if (FAILED(hresult))

  {

    printf("ERROR: Cannot create instance: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Unwrap the ArrayList instance inside the ObjectHandle

  VariantInit(&arrayList);

  hresult = pHandle->Unwrap(&arrayList);

  if (FAILED(hresult))

  {

    printf("ERROR: Could not unwrap object handle: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Get the IDispatch interface so we can call the Capacity property

  hresult = arrayList.punkVal->QueryInterface(IID_IDispatch,

    (void**)&pDisp);

  if (FAILED(hresult))

  {

    printf("ERROR: Could not get IDispatch interface pointer: 0x%x\n",

      hresult);

    Cleanup();

    return -1;

  }



  // Get the DISPID for the Capacity property

  OLECHAR* name = L"Capacity";

  DISPID dispid;

  hresult = pDisp->GetIDsOfNames(IID_NULL, &name, 1, GetUserDefaultLCID(),

    &dispid);

  if (FAILED(hresult))

  {

    printf("ERROR: GetIDsOfNames failed: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  // Invoke the Capacity property

  VARIANT result;

  VariantInit(&result);

  DISPPARAMS params = { NULL, NULL, 0, 0 };



  hresult = pDisp->Invoke(dispid, IID_NULL, GetUserDefaultLCID(),

    DISPATCH_PROPERTYGET, &params, &result, NULL, NULL);

  if (FAILED(hresult))

  {

    printf("ERROR: Invoke failed: 0x%x\n", hresult);

    Cleanup();

    return -1;

  }



  printf("ArrayList Capacity: %d\n", result.lVal);



  Cleanup();

  return 0;

};



					  



					



// http://social.msdn.microsoft.com/Forums/vstudio/en-US/ce105a9b-837d-4384-ac03-287b45c1ecc9/marshalling-safearray-of-user-defined-struct					

					  

					  

					  

					  __declspec(dllexport) SAFEARRAY * music_library_get_songs()



	{



		USES_CONVERSION;



		HRESULT hr = S_OK;







		// safe array dim



		SAFEARRAYBOUND safeArrayDim[1];



		safeArrayDim[0].lLbound = 0;



		safeArrayDim[0].cElements = 5;







		// create safe array



		SAFEARRAY * pSafeArray = SafeArrayCreate(VT_VARIANT,1,safeArrayDim);







		// fill safe array with data



		if(pSafeArray != NULL) {



			unsigned int i;



			long index;



			pSafeArray->pvData = malloc(5*sizeof(t_song));



			for(i = safeArrayDim[0].lLbound; i < safeArrayDim[0].cElements + safeArrayDim[0].lLbound; i++) {



				VARIANT vOut;



				VariantInit(&vOut);



				t_song * song = (t_song*)malloc(sizeof(t_song));



				song->album = "album";



				song->artist = "artist";



				song->name = "name";



				/* i don't know how to connect the song structure with the VARIANT 



				*/



				hr = SafeArrayPutElement(pSafeArray, &index, &vOut);



				VariantClear(&vOut);



			}



		}



		return pSafeArray;



	}

managed c# code

// structure marshaling



[StructLayout(LayoutKind.Sequential)]



        public class Song



        {



           [MarshalAs(UnmanagedType.LPTStr)]



           public string name;



           [MarshalAs(UnmanagedType.LPStr)]



           public string album;



           [MarshalAs(UnmanagedType.LPStr)]



           public string artist;        







        }











[DllImport(MyLibrary.dll)]



[return: MarshalAs(UnmanagedType.SafeArray, SafeArraySubType=VarEnum.VT_VARIANT)]









USES_CONVERSION;  // enables use of ATL conversion macro A2W

char buffer[20];  // used to store ANSI string

HRESULT hr= S_OK;



// Create SafeArray of VARIANT BSTRs

SAFEARRAY *pSA;

SAFEARRAYBOUND aDim[1];    // a one dimensional array

aDim[0].lLbound= 0;  // Visual Basic arrays start with index 0

aDim[0].cElements= 10;

pSA= SafeArrayCreate(VT_VARIANT,1,aDim);  // create a 1D SafeArray of VARIANTS

if (pSA != NULL) {

    long aLong[1];

    // iterate over array adding VARIANTs of type VT_BSTR

    for (long l= aDim[0].lLbound; l< (aDim[0].cElements + aDim[0].lLbound); l++) { 

        VARIANT vOut;

        VariantInit(&vOut);

        vOut.vt= VT_BSTR;  // set type

        ltoa(l,buffer,10);  // convert long to ANSI string value

        vOut.bstrVal= ::SysAllocString(A2W(buffer)); // system wide "new"

        aLong[0]= l;  // set index value

        if (hr= SafeArrayPutElement(pSA, aLong, &vOut)) { // "correctly" copies VARIANT

            VariantClear(&vOut);  // release BSTR from memory on error

            SafeArrayDestroy(pSA); // does a deep destroy on error

            return hr;

        }

        VariantClear(&vOut);  // does a deep destroy of source VARIANT

    } // end iteration

}

// clean up here only if you do not return SafeArray as an [out, retval]

SafeArrayDestroy(pSA); // again does a deep destroy









// Learning DCOM book on Safary

void CallOcrImage(IOcr *pIOcr, BYTE *pImage, ULONG len)

{

   // Create a one-dimensional SAFEARRAY of BYTEs (VT_UI)

   // The size of this array is len, which represents our image length.

   SAFEARRAY *psa = SafeArrayCreateVector(VT_UI1, 0, len);

   // Access the data pointer

   unsigned char *pc = NULL;

   SafeArrayAccessData(psa, reinterpret_cast<void HUGEP**>(&pc));

   // Copy our binary image data into array

   memcpy(pc, pImage, len);

   // Done accessing, so unaccess now.

   SafeArrayUnaccessData(psa);

   // Now we've got the array, we need to store it in

   // a VARIANT (the value holder).

   VARIANT vImage;           // So, let's create a variant

   VariantInit(&vImage); // Initialize the variant

   // Tell the value holder it's holding a SAFEARRAY of bytes

   binaryImageArray.vt = (VT_ARRAY|VT_UI1) ;

   binaryImageArray.parray = psa;   // Let the variant hold the array

   // Yes!  That much set up work before we can invoke a method!

   // Now for the method invocation...

    BSTR pOcrText ;  // Where the OCR text will be stored

    HRESULT hr = pIOcr->OcrImage(vImage, &pOcrText);

   if (SUCCEEDED(hr)) {

      m_strOCRResults = pOcrText ;

      SysFreeString(pOcrText) ;

   }

   SafeArrayDestroyData(psa);  // Destroy the data within the SAFEARRAY

   SafeArrayDestroy(psa);      // Destroy the SAFEARRAY

   // Clear the data

   VariantClear(&binaryImageArray);

}







void CVcpphostclrDlg::OnTestmanagedclassButton()



   HRESULT hRes;

   ICorRuntimeHost *pRuntimeHost;

   IUnknown *pUnkAppDomain;

   _AppDomain *pAppDomain;

   _ObjectHandle *pHandle;

   OLECHAR *methodName=L"GetSalary";

   VARIANT vntResult;

   float fltVal;

   DISPID dispid;

   EXCEPINFO errorInfo;

   UINT intArg;

   DISPPARAMS param;

   BSTR bstrTypeName, bstrAssemblyName;

   SAFEARRAY *paramArray;

   VARIANT paramID, paramName;

   VARIANT paramSalary, paramBonus;

   LONG index;

   hRes=CoInitializeEx(NULL,COINIT_MULTITHREADED);

   if (FAILED(hRes))

       AfxMessageBox("Could not initialize COM");

   hRes=CoCreateInstance(CLSID_CorRuntimeHost,

       NULL,CLSCTX_INPROC_SERVER,

       IID_ICorRuntimeHost,

       (void **)&pRuntimeHost);

   if (FAILED(hRes))

       AfxMessageBox("Could not create host");

   hRes=pRuntimeHost->Start();

   hRes=pRuntimeHost->GetDefaultDomain(

       &pUnkAppDomain);

   if (FAILED(hRes))

       AfxMessageBox("Could not get Appdomain");

   hRes=pUnkAppDomain->QueryInterface(

       IID__AppDomain,(void **)&pAppDomain);

   if (FAILED(hRes))

       AfxMessageBox("Failed to get domain");

   if (pUnkAppDomain!=NULL)

       pUnkAppDomain->Release();

   bstrTypeName=SysAllocString(

       L"AssemblyDemo.Manager");

   bstrAssemblyName=SysAllocString(

       L"multifile3,Version=2.0.0.0,Culture=neutral,

         PublicKeyToken=8a707be49fd7d8f4");

   paramArray=SafeArrayCreateVector(VT_VARIANT,0,4);



   VariantInit(&paramID);

   paramID.vt=VT_I4;

   paramID.lVal=45;

   index=0;

   hRes=SafeArrayPutElement(paramArray,

       &index,&paramID);

   VariantInit(&paramName);

   paramName.vt=VT_BSTR;

   paramName.bstrVal=SysAllocString(L"Alan Gordon");

   index=1;

   hRes=SafeArrayPutElement(paramArray,

       &index,&paramName);

   VariantInit(&paramSalary);

   paramSalary.vt=VT_R4;

   paramSalary.fltVal=1000.0;

   VariantChangeType(&paramSalary,&paramSalary,

       0,VT_DECIMAL);

   index=2;

   hRes=SafeArrayPutElement(paramArray,

       &index,&paramSalary);

   VariantInit(&paramBonus);

   paramBonus.vt=VT_R4;

   paramBonus.fltVal=100.0;

   VariantChangeType(&paramBonus,&paramBonus,

       0,VT_DECIMAL);

   index=3;

   hRes=SafeArrayPutElement(paramArray,

       &index,&paramBonus);

   hRes=pAppDomain->CreateInstance_3(

       bstrAssemblyName,bstrTypeName,VARIANT_TRUE,

       BindingFlags_Default,NULL,paramArray,

       NULL,NULL,NULL,&pHandle);

   if (FAILED(hRes))

       AfxMessageBox("Could not create object");

   VARIANT vntObject;

   IDispatch *pObject;

   VariantInit(&vntObject);

   pHandle->Unwrap(&vntObject);

   vntObject.punkVal->QueryInterface(IID_IDispatch,

       (void **)&pObject);

   if (vntObject.punkVal!=NULL)

       vntObject.punkVal->Release();



   param.cArgs=0;

   param.rgvarg=NULL;

   param.cNamedArgs=0;

   param.rgdispidNamedArgs=NULL;

   VariantInit(&vntResult);

   hRes=pObject->GetIDsOfNames(IID_NULL,

       &methodName,1,GetUserDefaultLCID(),&dispid);

   hRes=pObject->Invoke(dispid,IID_NULL,

       GetUserDefaultLCID(),

       DISPATCH_METHOD,&param,&vntResult,

       &errorInfo,&intArg);

   if (SUCCEEDED(hRes))

   {

       vntResult.decVal;

       VarR4FromDec(&vntResult.decVal,&fltVal);

   }

   else

   {

   // Handle the error, code omitted...

   }

   if (pObject!=NULL)

       pObject->Release();

   if (pAppDomain!=NULL)

       pAppDomain->Release();



   SysFreeString(bstrTypeName);

   SysFreeString(bstrAssemblyName);

   SafeArrayDestroy(paramArray);

}





					  





					  

					  

					  // _bstr_t_Assign.cpp



#include <comdef.h>

#include <stdio.h>



int main()

{

    // creates a _bstr_t wrapper

    _bstr_t bstrWrapper; 



    // creates BSTR and attaches to it

    bstrWrapper = "some text";

    wprintf_s(L"bstrWrapper = %s\n",

              static_cast<wchar_t*>(bstrWrapper));



    // bstrWrapper releases its BSTR

    BSTR bstr = bstrWrapper.Detach();

    wprintf_s(L"bstrWrapper = %s\n", 

              static_cast<wchar_t*>(bstrWrapper));

    // "some text" 

    wprintf_s(L"bstr = %s\n", bstr);



    bstrWrapper.Attach(SysAllocString(OLESTR("SysAllocedString")));

    wprintf_s(L"bstrWrapper = %s\n", 

              static_cast<wchar_t*>(bstrWrapper));



    // assign a BSTR to our _bstr_t

    bstrWrapper.Assign(bstr);

    wprintf_s(L"bstrWrapper = %s\n", 

              static_cast<wchar_t*>(bstrWrapper));



    // done with BSTR, do manual cleanup

    SysFreeString(bstr);



    // resuse bstr

    bstr= SysAllocString(OLESTR("Yet another string"));

    // two wrappers, one BSTR 

    _bstr_t bstrWrapper2 = bstrWrapper;   



    *bstrWrapper.GetAddress() = bstr;



    // bstrWrapper and bstrWrapper2 do still point to BSTR

    bstr = 0;   

    wprintf_s(L"bstrWrapper = %s\n", 

              static_cast<wchar_t*>(bstrWrapper));

    wprintf_s(L"bstrWrapper2 = %s\n", 

              static_cast<wchar_t*>(bstrWrapper2));



    // new value into BSTR

    _snwprintf_s(bstrWrapper.GetBSTR(), 100, bstrWrapper.length(),

                 L"changing BSTR");   

    wprintf_s(L"bstrWrapper = %s\n", 

              static_cast<wchar_t*>(bstrWrapper));

    wprintf_s(L"bstrWrapper2 = %s\n", 

              static_cast<wchar_t*>(bstrWrapper2));

}







HRESULT PASCAL __export CPoly::EnumPoints(IEnumVARIANT FAR* FAR* ppenum)

{

  unsigned int i;

  HRESULT hresult;

  VARIANT var;

  SAFEARRAY FAR* psa;

  CEnumPoint FAR* penum;

  POINTLINK FAR* ppointlink;

  SAFEARRAYBOUND rgsabound[1];

  rgsabound[0].lLbound = 0;

  rgsabound[0].cElements = m_cPoints;



  psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound);

  if(psa == NULL){

    HRESULT = ResultFromScode(E_OUTOFMEMORY);

    goto LError0;

  }



  // Code omitted here for brevity.



    V_VT(&var) = VT_DISPATCH;

    HRESULT = ppointlink->ppoint->QueryInterface(

    IID_IDispatch, (void FAR* FAR*)&V_DISPATCH(&var));

    if(HRESULT != NOERROR)

      goto LError1;



    ix[0] = i;

    SafeArrayPutElement(psa, ix, &var);



    ppointlink = ppointlink->next;

  }



  HRESULT = CEnumPoint::Create(psa, &penum);

  if(HRESULT != NOERROR)

    goto LError1;

  *ppenum = penum;

  return NOERROR;



LError1:;

  SafeArrayDestroy(psa);



LError0:;

  return hresult;

}



// http://social.msdn.microsoft.com/Forums/vstudio/en-US/cdc68fd4-08d5-4bfd-8dd7-6c095bd619a6/any-easy-way-to-create-a-safearray

void AlternativeSetSafeArrayData(/*[in]*/ SAFEARRAY* psaStrings)

{

  BSTR  bstr = ::SysAllocString(OLESTR("Another BSTR."));

  VARIANT var;

  long  lIndexVector[1];



  lIndexVector[0] = 0;

  

  VariantInit(&var);

  VariantClear(&var);

  V_VT(&var) = VT_BSTR;

  V_BSTR(&var) = bstr;



  SafeArrayPutElement

  (

    psaStrings, 

    (long*)lIndexVector,

    (void*)&var

  );

  

  VariantClear(&var);

}