C / C++ / MFC

COleDataSource* CGridCtrl::CopyTextFromGrid()
{
    USES_CONVERSION;

    CCellRange Selection = GetSelectedCellRange();
    if (!IsValid(Selection))
        return NULL;

    if (GetVirtualMode())
        SendCacheHintToParent(Selection);

    // Write to shared file (REMEBER: CF_TEXT is ANSI, not UNICODE, so we need to convert)
    CSharedFile sf(GMEM_MOVEABLE | GMEM_DDESHARE | GMEM_ZEROINIT);

    // Get a tab delimited string to copy to cache
    CString str;
    CGridCellBase *pCell;
    for (int row = Selection.GetMinRow(); row <= Selection.GetMaxRow(); row++)
    {
        // don't copy hidden cells
        if( m_arRowHeights[row] <= 0 )
            continue;

        str.Empty();
        for (int col = Selection.GetMinCol(); col <= Selection.GetMaxCol(); col++)
        {
            // don't copy hidden cells
            if( m_arColWidths[col] <= 0 )
                continue;

            pCell = GetCell(row, col);
            if (pCell &&(pCell->GetState() & GVIS_SELECTED))
                str += pCell->GetText();

            if (col != Selection.GetMaxCol()) 
                str += _T("\t");
        }
        if (row != Selection.GetMaxRow()) 
            str += _T("\n");

#ifdef _UNICODE
		sf.Write( str, str.GetLength() );
#else
        sf.Write(T2A(str.GetBuffer(1)), str.GetLength());
        str.ReleaseBuffer();
#endif
    }
    
    //char c = '\0';
	TCHAR c = '\0';
    sf.Write(&c, 1);

    if (GetVirtualMode())
        SendCacheHintToParent(CCellRange(-1,-1,-1,-1));

    DWORD dwLen = (DWORD) sf.GetLength();
    HGLOBAL hMem = sf.Detach();
    if (!hMem)
        return NULL;

    hMem = ::GlobalReAlloc(hMem, dwLen, GMEM_MOVEABLE | GMEM_DDESHARE | GMEM_ZEROINIT);
    if (!hMem)
        return NULL;

    // Cache data
    COleDataSource* pSource = new COleDataSource();
#ifdef _UNICODE
	pSource->CacheGlobalData(CF_UNICODETEXT, hMem);
#else
	pSource->CacheGlobalData(CF_TEXT, hMem);
#endif

    return pSource;
}