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Retrieve full path of file from IStream instance

Posted on 2012-04-02
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Last Modified: 2012-04-06
Hi I am implementing a thumbnail provider for my custom files. So I have implemented 2 interfaces IThumbnailProvider and IInitializeWithStream interface. I have over written the methods Initialize() of IInitializeWithStream and GetThumbnail() of IThumbnailProvider .

Initialize() and GetThumbnail() methods are invoked when user open a directory in Windows Explorer which consists of my custom files.

In Initialize(), I get an instance to IStream object. Over here i am able to retrieve just the file name. is there any way through which i can retrieve Full path of the file.

I have tried using IStream_ReadPidl() but some how it fails. it doesnt return S_OK. It returns 0x8007000D.



I am using Visual Studio 2010. And working on a Windows 7 OS.

Regards
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Question by:RsTVS
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by:RsTVS
ID: 37795552
I have tried using IStream_ReadPidl() but some how it fails. it doesnt return S_OK
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Accepted Solution

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RsTVS earned 0 total points
ID: 37815222
Got the full path of the file using a different method.
Get the explorer handle first.
Check the handle of Addressbar of Windows Explorer with SPY++ and i went down the windows hierarchy and got the folder path. Check the code below and you will get the full folder path.

  HWND l_pExplorerhwnd = ::GetForegroundWindow();
  TCHAR l_szTempName[MAX_PATH];

  if(l_pExplorerhwnd)
  {
    HWND hwnd = ::FindWindowEx(l_pExplorerhwnd, NULL, L"WorkerW", NULL);
    if(hwnd)
    {
      hwnd = ::FindWindowEx(hwnd, NULL, L"ReBarWindow32", NULL);
      if(hwnd)
      {
        hwnd = ::FindWindowEx(hwnd, NULL, L"Address Band Root", NULL);
        if(hwnd)
        {
          hwnd = ::FindWindowEx(hwnd, NULL, L"msctls_progress32", NULL);
          if(hwnd)
          {
            hwnd = ::FindWindowEx(hwnd, NULL, L"Breadcrumb Parent", NULL);
            if(hwnd)
            {
              hwnd = ::FindWindowEx(hwnd, NULL, L"ToolbarWindow32", NULL);
              if(hwnd)
                ::InternalGetWindowText (hwnd, l_szTempName, MAX_PATH);
              else
                return E_FAIL;
            }
            else
              return E_FAIL;
          }
          else
            return E_FAIL;
        }
        else
          return E_FAIL;
      }
      else
        return E_FAIL;
    }
    else
      return E_FAIL;
  }
  else
    return E_FAIL;

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Retrieve the file name from IStream interfaces stat function and append it to the folder path.
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