Vc6.0中.从EXCEL9.OLB中导出的excel9.cpp和excel9.h用来操作EXCEL.请问如果设置列宽?

用以下方法作操EXECL..怎么设置列宽
{Application app;
Workbooks books;
_Workbook book;
Worksheets sheets;
_Worksheet sheet;
Range range;
Range iCell;
LPDISPATCH lpDisp;
COleVariant vResult;
COleVariant
covTrue((short)TRUE),
covFalse((short)FALSE),
covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);



if(!app.CreateDispatch("Excel.Application"))
{
AfxMessageBox("无法启动Excel服务器!");
return FALSE;
}

//打开
books.AttachDispatch(app.GetWorkbooks());
lpDisp = books.Open(CPhoneUsersApp::m_szPath,
covOptional, covOptional, covOptional, covOptional, covOptional,
covOptional, covOptional, covOptional, covOptional, covOptional,
covOptional, covOptional );

//得到Workbook
book.AttachDispatch(lpDisp);

//得到Worksheets
sheets.AttachDispatch(book.GetWorksheets());
//*****
//得到当前活跃sheet
//如果有单元格正处于编辑状态中，此操作不能返回，会一直等待
lpDisp=book.GetActiveSheet();
sheet.AttachDispatch(lpDisp);





//*****
//读取已经使用区域的信息，包括已经使用的行数、列数、起始行、起始列
Range usedRange;
usedRange.AttachDispatch(sheet.GetUsedRange());
range.AttachDispatch(usedRange.GetRows());
long iRowNum=range.GetCount(); //已经使用的行数

range.AttachDispatch(usedRange.GetColumns());
long iColNum=range.GetCount(); //已经使用的列数

long iStartRow=usedRange.GetRow(); //已使用区域的起始行，从1开始
long iStartCol=usedRange.GetColumn(); //已使用区域的起始列，从1开始
book.Save();

//*****
//关闭所有的book，退出Excel
book.Close (covOptional,COleVariant(CPhoneUsersApp::m_szPath),covOptional);
books.Close();
app.Quit();

book.ReleaseDispatch();
books.ReleaseDispatch();
app.ReleaseDispatch();
}