打开当前目录下的逐个xls文件，然后根据每个xls文件里面工作表表名调用不同程序进行处理
nExcel=CreateObject('Excel.Application')
mbExcel = nexcel.Application.Workbooks.Open(SYS(5)+SYS(2003)"\汇总\汇总.xls")
oexcel = Createobject("excel.application")
xlsnumber = ADIR(xlsdata, '*.xls')  && Create array
FOR nCount = 1 TO xlsnumber  && Loop for number of databases
    ?xlsdata(nCount,1)  && Display database names
    xlsfilename=nowdir+'\'+xlsdata(nCount,1)  
sjlyExcel = oexcel.Application.Workbooks.Open(xlsfilename)
With oExcel
     lnSheetCount=.WorkBooks(1).Sheets.Count
Endwith
?xlsfilename+'中工作表的数目为：'+Alltrim(Str(lnSheetCount))

For Each oMyVar In oExcel.sheets
     sheetname=oMyVar.Name
     oExcel.Worksheets(sheetname).Activate
     DO CASE
      CASE 'a'$sheetname
     do a
      CASE 'b'$sheetname
     do b
      CASE 'c'$sheetname
    do c
       OTHERWISE  
     ENDCASE
Next oMyVar
oExcel.WORKBOOKS.Close &&关闭工作簿
ENDFOR
到了这关闭工作簿这句：oExcel.WORKBOOKS.Close，系统就死机了，为何？