ExcelApplication，关于将xls文件保存为单一网格文件的问题(100)

ExcelApplication1.Workbooks.Open('C:/123.xls',EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,EmptyParam,0); ExcelApplication1.ActiveWorkbook.SaveAs('c:/123.mht',xlmht, EmptyParam,EmptyParam,EmptyParam, EmptyParam,0,EmptyParam, EmptyParam, EmptyParam,EmptyParam,EmptyParam,1);第二段提示没有定义xlmht不知道SaveAs里的参数怎么写，请大家帮个忙？很急呀谢谢