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Reading Cell Values In Excel 2000 Using C++

Posted on 2007-11-15
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Last Modified: 2013-11-20
I have an Excel 2000 spreadsheet that I am trying to read data from using C++.  I have used the code in the following link to get me started and this works well.

http://www.experts-exchange.com/Programming/Programming_Languages/Cplusplus/Q_20642013.html

I am now trying to tweak the code so rather than create a new spreadsheet, I open an existing one (which I have figured out how to do), and then read the data in a given cell (which I can't do).  I have found numerous examples of Excel automation on the internet, but have yet to find one that shows how to do this.  Any help would be greatly appreciated.
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Question by:reidy_boy
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jkr earned 200 total points
ID: 20289477
Take a look at http://www.codeproject.com/useritems/HOOK_COM.asp ("Get Cell Text of Excel"):


COleVariant VOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);
 
    _Application objApp;
    Window objWin;
 
    Range objRange;
    VARIANT ret;
    
    CLSID clsid ;
    if (CLSIDFromProgID(OLESTR("Excel.Application.9"), &clsid) == NOERROR)
    {
     // Recherche du server Excel s'il est lance
     LPUNKNOWN lpUnk ;
     LPDISPATCH lpDispatch ;
     if (GetActiveObject(clsid, NULL, &lpUnk) == S_OK)
     {
      HRESULT hr = lpUnk->QueryInterface(IID_IDispatch, (LPVOID*)&lpDispatch) ;
      lpUnk->Release() ;
      if (hr == NOERROR)
      {
       objApp.AttachDispatch(lpDispatch, TRUE) ;
      }
     }
    }
 
    objWin = objApp.GetActiveWindow();
    objRange = objWin.GetActiveCell();
    ret = objRange.GetValue();
 
    BSTR txt;
    txt = ret.bstrVal;
    char *p=_com_util::ConvertBSTRToString(txt); 

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by:reidy_boy
ID: 31409308
Took a bit of playing around with, but got there in the end.  I realised other examples weren't working because I had the wrong .olb version installed for Excel 2000, but this solution included the code that I sould have been using.  Excellent, thanks.
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