excel中workbook的saveAs函数的用法，最好给出例子，谢谢！

Question

我是这样写的： 
 wbMyBook.AttachDispatch(wbsMyBooks.Add(vtMissing));
   wbMyBook.SaveAs_variant_tsFile),vtMissing,vtMissing,
                  vtMissing,vtMissing,vtMissing,vtMissing,
                  vtMissing,vtMissing,vtMissing,vtMissing);
编译通过，在执行到saveas函数时就通不过。为什么？

Answer 1

   COleVariant
                  covTrue((short)TRUE),
                  covFalse((short)FALSE),
                  covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);
VARIANT vFileName;
vFileName.vt=VT_BSTR;
vFileName.bstrVal=(_bstr_t)m_file;
book.SaveAs(vFileName, // This is a test workbook.
covOptional,
covOptional,
covOptional,
covOptional,
covOptional,
0,
covOptional,
covOptional,
covOptional,
covOptional);
app.SetVisible(TRUE); 
//完成