BCB2007打开XLS揭示不正确的变量类型

BCB2007打开XLS提示不正确的变量类型
工作需要，对XLS文件里许多内容处理，手工太慢，想用这个，结果装载文件这一步就挂了……
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Variant Excel,Workbooks,Workbook;
Variant Worksheets,Worksheet, Range, Cell, FColumns, Format, Item;
bool bIsCreated;
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AnsiString xls_file_path;
init_excel_obj();//

// 若先前尚未建立 Excel 物件, 则建立之.
    if (!bIsCreated)
    {
     // 建立一个可见的 Excel 物件
     Excel=Variant::CreateObject("Excel.Application");
 Excel.OlePropertySet("Visible", false);
}

xls_file_path=ExtractFilePath(Application->ExeName)+"xx.xls";
//ShowMessage(xls_file_path);
    // 开启某个已存在的 workbooks 跟 workbook.
Workbooks=Excel.OlePropertyGet("Workbooks");
//Workbook=Workbooks.OleFunction("Open", "d:\test1.xls");

        Workbook=Workbooks.OleFunction("open", xls_file_path);

 //Excel.OlePropertyGet("workbooks").OleFunction("Open", xls_file_path);


    // 将该Excel 档的 Worksheets 设给变数 Worksheets.
Worksheets=Workbook.OlePropertyGet("Worksheets");
[解决办法]
百毒一下，你就被骗。

Variant vExcel = Variant::CreateObject("Excel.Application");
vExcel.OlePropertySet("Visible", false);

AnsiString xls_file_path = ExtractFilePath(Application->ExeName) + "xx.xls";
if (!FileExists(xls_file_path))
{
    ShowMessage("文件根本不存在");
    return;
}

Excel.OlePropertyGet("Workbooks")
        .OleFunction("Open", WideString(xls_file_path));

Variant vSheet = vExcelApp.OlePropertyGet("ActiveWorkbook")
            .OlePropertyGet("Sheets", 1);

...