建立一个模本excel文件d:\ExcelExample.xls
wincc里创建内部变量i，无符号32位
在全局脚本vb创建两个动作
1、复制另存ExcelExample.xls，并改名为当天日期，触发周期为1天，i被赋值为2
Option Explicit
Function action
Dim fso,myfile,daystr,dstr,fname
dstr = FormatDateTime(Date)
fname="d:\" + dstr + ".xls"
Set fso = CreateObject("s cripting.FileSystemObject")
Set MyFile = fso.GetFile("d:\ExcelExample.xls")
MyFile.Copy (fname)
HMIRuntime.Tags("i").write 2
End Function
2、往当天的excel文件里写数据，并保存
Option Explicit
Function action
Dim fso,myfile,daystr,dstr,fname

dstr = FormatDateTime(Date)
fname="d:\" + dstr + ".xls"

Dim ObjExcelApp

Set objExcelApp = CreateObject("Excel.Application")

objExcelApp.Workbooks.Open fname

Dim i

HMIRuntime.Tags("i").write HMIRuntime.Tags("i").Read+1
i=HMIRuntime.Tags("i").Read

objExcelApp.worksheets ("sheet1").Cells(i, 2).VAlue = HMIRuntime.Tags("I-COD").read
objExcelApp.worksheets ("sheet1").Cells(i, 3).VAlue = HMIRuntime.Tags("I-SS").read
objExcelApp.worksheets ("sheet1").Cells(i, 4).VAlue = HMIRuntime.Tags("I-PH").read
objExcelApp.worksheets ("sheet1").Cells(i, 5).VAlue = HMIRuntime.Tags("I-F").read
objExcelApp.worksheets ("sheet1").Cells(i, 6).VAlue = HMIRuntime.Tags("I-FI").read
objExcelApp.worksheets ("sheet1").Cells(i, 7).VAlue = HMIRuntime.Tags("O-COD").read
objExcelApp.worksheets ("sheet1").Cells(i, 8).VAlue = HMIRuntime.Tags("O-SS").read
objExcelApp.worksheets ("sheet1").Cells(i, 9).VAlue = HMIRuntime.Tags("O-NH4N").read
objExcelApp.worksheets ("sheet1").Cells(i, 10).VAlue = HMIRuntime.Tags("0-P").read
objExcelApp.worksheets ("sheet1").Cells(i, 11).VAlue = HMIRuntime.Tags("O-F").read
objExcelApp.worksheets ("sheet1").Cells(i, 12).VAlue = HMIRuntime.Tags("O-FI").read
objExcelApp.worksheets ("sheet1").Cells(i, 1).VAlue =Now
objExcelApp.ActiveWorkbook.Save
objExcelApp.Workbooks.ClosE
objExcelApp.QuiT

Set ObjEXceLapp = Nothing

End Function
问题：怎么在退出wincc时，保存i的值，使wincc再激活时，向excel最后位置写数据
注：从wincc帮助抄的程序