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IRunningObjectTable::GetObject return a error

• Monday, July 07, 2008 4:09 AMliixixi

   
  

  0
  Hi, 
      When I use RunningObjectTable, there is a puzzling error. Why I can't get a right pointer by IRunningObjectTable::GetObject.
  
      Here is the test code:
  
  

  int main(int argc, char* argv[])
  {
      CoInitialize(NULL);

      {
          CComPtr<IHello> ptr;
          ptr.CoCreateInstance(CLSID_Hello);

          ptr->Hello();    // I can InternalAddRef() in this function.
      }                         // So, when ptr is auto released, the object in COM server end will not be desstructed.

      {
          HRESULT hr = S_OK;
          IRunningObjectTable* pROT = NULL;
         
          const WCHAR szDelim[2] = L"!";
          IMoniker*   pmkService = NULL;
         
          CComBSTR    bstrMkItemName("12345678");
         
          hr = CreateItemMoniker( szDelim, bstrMkItemName, &pmkService );
          if( FAILED( hr ) )
          {
              return hr;
          }
         
         
          hr = GetRunningObjectTable( 0, &pROT );
          if( FAILED( hr ) )
          {
              return hr;
          }
         
         
          IUnknown* pUnk;
          pROT->GetObject(pmkService, &pUnk);          // after this line, why pUnk = NULL?

          IHello* iptr;
          pUnk->QueryInterface(&iptr);

          iptr->Hello();
      }

   return 0;
  }    
  
  The code in COM server end:
  

  STDMETHODIMP CHello::Hello()
  {
      MessageBox(NULL, "Hello", "", MB_OK);

      HRESULT hr = S_OK;
      IRunningObjectTable* pROT = NULL;

      const WCHAR szDelim[2] = L"!";
   IMoniker*   pmkService = NULL;

      CComBSTR    bstrMkItemName("12345678");

   hr = CreateItemMoniker( szDelim, bstrMkItemName, &pmkService );
      if( FAILED( hr ) )
   {
          return hr;
   }

  
   hr = GetRunningObjectTable( 0, &pROT );
   if( FAILED( hr ) )
   {
          return hr;
   }

   hr = pROT->Register(0, this, pmkService, &m_dwRegister);

      this->InternalAddRef();
   return S_OK;
  }

  
  
   

  thanks.
  liixixi
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