Question

VB 打开已有excel、修改、保存，出错提示“该文件已存在，是否要覆盖” 源代码如下，如何解决？

Private Sub Command1_Click()
Dim i As Variant

' Dim xlApp As Excel.Application
'Dim xlBook As Excel.Workbook
' Dim xlsheet As Excel.Worksheet
Set xlApp = CreateObject("Excel.application")
xlApp.Visible = False
Set xlBook = xlApp.Workbooks.Open("d:\大宋银行.xls", 3, False)
Set xlsheet = xlBook.Worksheets(1)
xlsheet.Activate
xlsheet.cells(1, 1) = "顾客"
xlsheet.cells(1, 2) = "金额"
i = 1
Do While xlsheet.cells(i, 1) <> ""
i = i + 1
Loop
xlsheet.cells(i, 1) = a
xlsheet.cells(i, 2) = 0

xlApp.activeWorkBook.save

xlBook.Close
xlApp.quit
Set xlsheet = Nothing
Set xlApp = Nothing
Set xlBook = Nothing
Form3.Show
End Sub
代码前3句如果去掉 ’ 的话， 就提示第一句用户类未定义，真搞不懂 不定义没事，一定义反而出错，VB真是够奇怪的，但是一些老工程师还爱用，参加工作不学还不行
a 是全局变量 无需再定义