Using Object Identifiers

9/8/2008

O seguinte exemplo de código mostra como recuperar dados do objeto armazenar ou volume montado usando o identificador objeto Windows Embedded CE. Para obter mais informações, consulte Objects and Object Identifiers.

void UsingCeOidGetInfo (void)
{
   CEOID CeOid;  // Object identifier.
   PCEGUID pceguid; // GUID of the mounted volume.
   CEOIDINFO CeObjectInfo; // Structure that will store retrieved data.
   // Object data
   TCHAR szMsg[200]; // String to use with object data
   // Assign to pceguid the CEGUID of the mounted volume on which the object resides.
   // Assign to CeOid the object identifier of the object about which you want to get data.
   CEGUID guid;
   pceguid = &guid;
   if (CeOidGetInfoEx (pceguid, CeOid, &CeObjectInfo))
   {
      switch (CeObjectInfo.wObjType)
      {
         case OBJTYPE_FILE: wsprintf (szMsg, TEXT("Object is a file: %s"), CeObjectInfo.infFile.szFileName);
         break;
         case OBJTYPE_DIRECTORY: wsprintf (szMsg, TEXT("Object is a directory: %s"), CeObjectInfo.infDirectory.szDirName);
         break;
         case OBJTYPE_DATABASE: wsprintf (szMsg, TEXT("Object is a database: %s"), CeObjectInfo.infDatabase.szDbaseName);
         break;
         case OBJTYPE_RECORD: wsprintf (szMsg, TEXT("Object is a record"));
         break;
         case OBJTYPE_INVALID: wsprintf (szMsg,
            TEXT("The object store does not contain a valid ")
            TEXT("object that has this object identifier."));
         break;
         default: wsprintf (szMsg, TEXT("Object is of unknown OBJTYPE"));
         break;
      }
   }
   else
   {
      // Your error-handling code goes here.
      if (GetLastError () == ERROR_INVALID_HANDLE)
         wsprintf (szMsg, TEXT("Invalid Object ID"));
      else
         wsprintf (szMsg, TEXT("Unknown error"));
   }
}

See Also

Concepts

Object Store