Bagaimana membaca dokumen senyawa properti secara langsung dengan VC ++

Langkah-langkah untuk membuat sampel

1. Membuat aplikasi konsol Win32 proyek baru, dan menyebutnya PropDump.
2. Menambah sebuah berkas baru yang disebut main.cpp untuk proyek Anda.
3. Salin kode berikut ke main.cpp:

      #include <stdio.h>
      #include <windows.h>
      #include <ole2.h>
      #include <locale.h>
   
   
   
      // Dumps simple PROPVARIANT values.
      void DumpPropVariant(PROPVARIANT *pPropVar) {
         // Don't iterate arrays, just inform as an array.
         if(pPropVar->vt & VT_ARRAY) {
            printf("(Array)\n");
            return;
         }
   
         // Don't handle byref for simplicity, just inform byref.
         if(pPropVar->vt & VT_BYREF) {
            printf("(ByRef)\n");
            return;
          }
   
         // Switch types.
         switch(pPropVar->vt) {
         case VT_EMPTY:
            printf("(VT_EMPTY)\n");
            break;
         case VT_NULL:
            printf("(VT_NULL)\n");
            break;
         case VT_BLOB:
            printf("(VT_BLOB)\n");
            break;
         case VT_BOOL:
            printf("%s (VT_BOOL)\n",
            pPropVar->boolVal ? "TRUE/YES" : "FALSE/NO");
            break;
         case VT_I2: // 2-byte signed int.
            printf("%d (VT_I2)\n", (int)pPropVar->iVal);
            break;
         case VT_I4: // 4-byte signed int.
            printf("%d (VT_I4)\n", (int)pPropVar->lVal);
            break;
         case VT_R4: // 4-byte real.
            printf("%.2lf (VT_R4)\n", (double)pPropVar->fltVal);
            break;
         case VT_R8: // 8-byte real.
            printf("%.2lf (VT_R8)\n", (double)pPropVar->dblVal);
            break;
            case VT_BSTR: // OLE Automation string.
            {
               // Translate into ASCII.
               char dbcs[1024];
               char *pbstr = (char *)pPropVar->bstrVal;
               int i = wcstombs(
               dbcs, pPropVar->bstrVal, *((DWORD *)(pbstr-4)));
               dbcs[i] = 0;
               printf("%s (VT_BSTR)\n", dbcs);
            }
            break;
         case VT_LPSTR: // Null-terminated string.
            {
            printf("%s (VT_LPSTR)\n", pPropVar->pszVal);
            }
            break;
         case VT_FILETIME:
            {
               char *dayPre[] =
                            {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
   
               FILETIME lft;
               FileTimeToLocalFileTime(&pPropVar->filetime, &lft);                SYSTEMTIME lst;
               FileTimeToSystemTime(&lft, &lst);
   
               printf("%02d:%02d.%02d %s, %s %02d/%02d/%d (VT_FILETIME)\n",
                  1+(lst.wHour-1)%12, lst.wMinute, lst.wSecond,
                  (lst.wHour>=12) ? "pm" : "am",
                  dayPre[lst.wDayOfWeek%7],
                  lst.wMonth, lst.wDay, lst.wYear);
            }
            break;
         case VT_CF: // Clipboard format.
            printf("(Clipboard format)\n");
   
            break;
         default: // Unhandled type, consult wtypes.h's VARENUM structure.
            printf("(Unhandled type: 0x%08lx)\n", pPropVar->vt);
            break;
         }
      }
   
      // Dump's built-in properties of a property storage.
      void DumpBuiltInProps(IPropertySetStorage *pPropSetStg) {
         printf("\n==================================================\n");
         printf("BuiltInProperties Properties...\n");
         printf("==================================================\n");
   
         IPropertyStorage *pPropStg = NULL;
         HRESULT hr;
   
         // Open summary information, getting an IpropertyStorage.
         hr = pPropSetStg->Open(FMTID_SummaryInformation,
         STGM_READ | STGM_SHARE_EXCLUSIVE, &pPropStg);
         //hr = pPropSetStg->Open(FMTID_UserDefinedProperties,
            //STGM_READ | STGM_SHARE_EXCLUSIVE, &pPropStg);
         if(FAILED(hr)) {
            printf("No Summary-Information.\n");
            return;
         }
         // Array of PIDSI's you are interested in.
         struct pidsiStruct {
            char *name;
            long pidsi;
         } pidsiArr[] = {
            {"Title",            PIDSI_TITLE}, // VT_LPSTR
            {"Subject",          PIDSI_SUBJECT}, // ...
            {"Author",           PIDSI_AUTHOR},
            {"Keywords",         PIDSI_KEYWORDS},
            {"Comments",         PIDSI_COMMENTS},
            {"Template",         PIDSI_TEMPLATE},
            {"LastAuthor",       PIDSI_LASTAUTHOR},
            {"Revision Number",  PIDSI_REVNUMBER},
            {"Edit Time",        PIDSI_EDITTIME}, // VT_FILENAME (UTC)
            {"Last printed",     PIDSI_LASTPRINTED}, // ...
            {"Created",          PIDSI_CREATE_DTM},
            {"Last Saved",       PIDSI_LASTSAVE_DTM},
            {"Page Count",       PIDSI_PAGECOUNT}, // VT_I4
            {"Word Count",       PIDSI_WORDCOUNT}, // ...
            {"Char Count",       PIDSI_CHARCOUNT},
   
            {"Thumpnail",        PIDSI_THUMBNAIL}, // VT_CF
            {"AppName",          PIDSI_APPNAME}, // VT_LPSTR
            {"Doc Security",     PIDSI_DOC_SECURITY}, // VT_I4
            {0, 0}
         };
         // Count elements in pidsiArr.
         int nPidsi = 0;
         for(nPidsi=0; pidsiArr[nPidsi].name; nPidsi++);
   
         // Initialize PROPSPEC for the properties you want.
         PROPSPEC *pPropSpec = new PROPSPEC [nPidsi];
         PROPVARIANT *pPropVar = new PROPVARIANT [nPidsi];
   
         for(int i=0; i<nPidsi; i++) {
            ZeroMemory(&pPropSpec[i], sizeof(PROPSPEC));
            pPropSpec[i].ulKind = PRSPEC_PROPID;
            pPropSpec[i].propid = pidsiArr[i].pidsi;
         }
   
   
   
         // Read properties.
         hr = pPropStg->ReadMultiple(nPidsi, pPropSpec, pPropVar);
   
         if(FAILED(hr)) {
            printf("IPropertyStg::ReadMultiple() failed w/error %08lx\n",
                   hr);
         }
         else {
            // Dump properties.
            for(i=0; i<nPidsi; i++) {
               printf("%16s: ", pidsiArr[i].name);
               DumpPropVariant(pPropVar + i);
            }
         }
   
         // De-allocate memory.
         delete [] pPropVar;
         delete [] pPropSpec;
   
         // Release obtained interface.
         pPropStg->Release();
   
      }
   
      // Dump's custom properties of a property storage.
      void DumpCustomProps(IPropertySetStorage *pPropSetStg) {
         printf("\n==================================================\n");
         printf("Custom Properties...\n");
         printf("==================================================\n");
   
         IPropertyStorage *pPropStg = NULL;
         HRESULT hr;
         IEnumSTATPROPSTG *pEnumProp;
   
         // Open User-Defined-Properties, getting an IpropertyStorage.
         hr = pPropSetStg->Open(FMTID_UserDefinedProperties,
            STGM_READ | STGM_SHARE_EXCLUSIVE, &pPropStg);
         if(FAILED(hr)) {
            printf("No User Defined Properties.\n");
            return;
         }
   
         // Get property enumerator.
         hr = pPropStg->Enum(&pEnumProp);
         if(FAILED(hr)) {
         pPropStg->Release();
            printf("Couldn't enumerate custom properties.\n");
            return;
         }
   
         // Enumerate properties.
         STATPROPSTG sps;
         ULONG fetched;
         PROPSPEC propSpec[1];
         PROPVARIANT propVar[1];
         while(pEnumProp->Next(1, &sps, &fetched) == S_OK) {
            // Build a PROPSPEC for this property.
            ZeroMemory(&propSpec[0], sizeof(PROPSPEC));
            propSpec[0].ulKind = PRSPEC_PROPID;
            propSpec[0].propid = sps.propid;
   
            // Read this property.
   
            hr = pPropStg->ReadMultiple(1, &propSpec[0], &propVar[0]);
            if(!FAILED(hr)) {
               // Translate Prop name into ASCII.
               char dbcs[1024];
               char *pbstr = (char *)sps.lpwstrName;
               int i = wcstombs(dbcs, sps.lpwstrName,
                                *((DWORD *)(pbstr-4)));
               dbcs[i] = 0;
   
               // Dump this property.
               printf("%16s: ", dbcs);
               DumpPropVariant(&propVar[0]);
            }
         }
   
         // Release obtained interface.
         pEnumProp->Release();
         pPropStg->Release();
   
      }
   
      // Dump's custom and built-in properties of a compound document.
      void DumpProps(char *filename) {
         // Translate filename to Unicode.
         WCHAR wcFilename[1024];
         setlocale( LC_ALL, "" );
         int i = mbstowcs(wcFilename, filename, strlen(filename));
         setlocale( LC_ALL, "C" );
         wcFilename[i] = 0;
   
         IStorage *pStorage = NULL;
         IPropertySetStorage *pPropSetStg = NULL;
         HRESULT hr;
   
         // Open the document as an OLE compound document.
         hr = ::StgOpenStorage(wcFilename, NULL,
         STGM_READ | STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage);
   
         if(FAILED(hr)) {
            if(hr == STG_E_FILENOTFOUND)
               printf("File not found.");
            else if(hr == STG_E_FILEALREADYEXISTS)
               printf("Not a compound file.");
            else
               printf("StgOpenStorage() failed w/error %08lx", hr);
            return;
         }
   
         // Obtain the IPropertySetStorage interface.
         hr = pStorage->QueryInterface(
                 IID_IPropertySetStorage, (void **)&pPropSetStg);
         if(FAILED(hr)) {
            printf("QI for IPropertySetStorage failed w/error %08lx", hr);
            pStorage->Release();
            return;
         }
   
         // Dump properties.
         DumpBuiltInProps(pPropSetStg);
         DumpCustomProps(pPropSetStg);
   
         // Release obtained interfaces.
         pPropSetStg->Release();
         pStorage->Release();
      }
   
      // Program entry-point.
      void main(int argc, char **argv) {
         // Validate arguments.
         if(argc != 2) {
            printf("- OLE Document Property Viewer\n");
            printf("- Usage: %s filename", argv[0]);
            return;
         }
   
         // Pass filename to the subroutine.
         DumpProps(argv[1]);
      }
   					

4. Menyusun program.

BuiltInProperties properti...

           Title: MyTitle (VT_LPSTR)
         Subject: MySubject (VT_LPSTR)
          Author: MyAuthor (VT_LPSTR)
        Keywords: MyKeywords (VT_LPSTR)
        Comments: MyComments (VT_LPSTR)
        Template: Normal (VT_LPSTR)
      LastAuthor: Me (VT_LPSTR)

 Revision Number: 8 (VT_LPSTR)

       Edit Time: 01:05.47 pm, Mon 01/01/1601 (VT_FILETIME)
    Last printed: (VT_EMPTY)
         Created: 01:42.00 pm, Fri 05/29/1998 (VT_FILETIME)
      Last Saved: 12:31.00 pm, Mon 06/01/1998 (VT_FILETIME)
      Page Count: 1 (VT_I4)
      Word Count: 3 (VT_I4)
      Char Count: 19 (VT_I4)
       Thumpnail: (VT_EMPTY)
         AppName: Microsoft Word 8.0 (VT_LPSTR)
    Doc Security: 0 (VT_I4)
				

Custom properti...

   _PID_LINKBASE: (VT_BLOB)

       _PID_GUID: (VT_BLOB)
       CustProp1: CustProp1TextValue (VT_LPSTR)
       CustProp2: 77777 (VT_I4)
       CustProp3: TRUE/YES (VT_BOOL)
       CustProp4: 00:00.00 am, Tue 05/17/1977 (VT_FILETIME)
				

Catatan tambahan

• Windows NT 4.0 atau yang lebih baru
• Windows 95 dengan Internet Explorer versi 4.0 atau yang lebih baru
• Windows 95 dengan DCOM diinstal

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