Rem  加载目标文件格式
Private Sub Form_Load()
TypeList.List(0) = "Excel 2003"
TypeList.List(1) = "Excel 2007"
End Sub


Rem  格式转换过程
Private Sub Convert_Click()

Rem 定义变量：源文件夹路径、目标文件夹路径、目标文件格式、目标文件名后缀
Dim SourceDir$, TargetDir$, ExcelTypeIn$, suffix$

Rem 判断源文件夹路径是否存在
SourceDir = Text1.Text
If Dir(SourceDir, vbDirectory) = "." Then
MsgBox "源文件夹路径不能为空！"
Exit Sub
ElseIf Dir(SourceDir, vbDirectory) = "" Then
MsgBox "源文件夹路径" & SourceDir & "不存在！"
Exit Sub
End If
SourceDir = SourceDir & "\"

Rem 判断目标文件夹路径是否存在
TargetDir = Text2.Text
If Dir(TargetDir, vbDirectory) = "." Then
MsgBox "目标文件夹路径不能为空！"
Exit Sub
ElseIf Dir(TargetDir, vbDirectory) = "" Then
MsgBox "目标文件夹路径" & TargetDir & "不存在！"
Exit Sub
End If
TargetDir = TargetDir & "\"

Rem 判断源文件夹路径和目标文件夹路径是否相等
If SourceDir = TargetDir Then
MsgBox "源文件夹路径和目标文件夹路径不能相等！"
Exit Sub
End If

Rem 判断目标文件的格式
ExcelTypeIn = Val(TypeList.ListIndex)
If ExcelTypeIn = "0" Then
suffix = ".xls"
ElseIf ExcelTypeIn = "1" Then
suffix = ".xlsx"
Else
MsgBox "请选择目标文件格式！"
Exit Sub
End If

Rem 当前系统安装什么Excel就获得相应的excel.application
Dim ExApp As Object
Set ExApp = CreateObject("excel.application")
ExApp.Application.ScreenUpdating = False

Dim sourceFile$, targetFile$
sourceFile = Dir(SourceDir & "*.xls")
Do While sourceFile <> ""
targetFile = Left(sourceFile, InStr(sourceFile, ".") - 1) & suffix  ‘目标文件名称

Rem  --------------------------具体转化过程开始----------------------------
ExApp.Workbooks.Open (SourceDir & sourceFile)
ExApp.Application.DisplayAlerts = False
If ExcelTypeIn = "0" Then
ExApp.ActiveWorkbook.SaveAs TargetDir & targetFile, xlExcel8     ‘转换为2003格式
ElseIf ExcelTypeIn = "1" Then
ExApp.ActiveWorkbook.SaveAs TargetDir & targetFile, 51         ‘转换为2007格式
End If
ExApp.Application.DisplayAlerts = True
ExApp.ActiveWorkbook.Close True
Rem  --------------------------具体转化过程结束----------------------------

sourceFile = Dir   ‘获得文件夹中的下一个文件
Loop
ExApp.Application.ScreenUpdating = False
MsgBox "文件夹内的所有Excel文件格式转换完毕！"
End Sub


Rem 结束按钮的事件程序
Private Sub CloseCmd_Click()
End
End Sub