今天查了查msdn，做了个简单的批量文件更名的程序！

呵呵，有意思！
Imports System.IO
Namespace Xyn.Xyn
    Public Class MainBase
        Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

        Public Sub New()
            MyBase.New()

            '该调用是 Windows 窗体设计器所必需的。
            InitializeComponent()

            '在 InitializeComponent() 调用之后添加任何初始化

        End Sub

        '窗体重写 dispose 以清理组件列表。
        Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
            If disposing Then
                If Not (components Is Nothing) Then
                    components.Dispose()
                End If
            End If
            MyBase.Dispose(disposing)
        End Sub

        'Windows 窗体设计器所必需的
        Private components As System.ComponentModel.IContainer

        '注意: 以下过程是 Windows 窗体设计器所必需的
        '可以使用 Windows 窗体设计器修改此过程。
        '不要使用代码编辑器修改它。
        Friend WithEvents MyFolderBrowserDialog As System.Windows.Forms.FolderBrowserDialog
        Friend WithEvents MyButton As System.Windows.Forms.Button
        Friend WithEvents MyTextBox As System.Windows.Forms.TextBox
        Friend WithEvents PathBox As System.Windows.Forms.TextBox
        Friend WithEvents Submit As System.Windows.Forms.Button
        Friend WithEvents Label1 As System.Windows.Forms.Label
        Friend WithEvents Label2 As System.Windows.Forms.Label
        <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
            Me.MyFolderBrowserDialog = New System.Windows.Forms.FolderBrowserDialog
            Me.MyButton = New System.Windows.Forms.Button
            Me.MyTextBox = New System.Windows.Forms.TextBox
            Me.PathBox = New System.Windows.Forms.TextBox
            Me.Submit = New System.Windows.Forms.Button
            Me.Label1 = New System.Windows.Forms.Label
            Me.Label2 = New System.Windows.Forms.Label
            Me.SuspendLayout()
            '
            'MyButton
            '
            Me.MyButton.Location = New System.Drawing.Point(257, 57)
            Me.MyButton.Name = "MyButton"
            Me.MyButton.Size = New System.Drawing.Size(104, 21)
            Me.MyButton.TabIndex = 0
            Me.MyButton.Text = "选择"
            '
            'MyTextBox
            '
            Me.MyTextBox.Location = New System.Drawing.Point(119, 112)
            Me.MyTextBox.Name = "MyTextBox"
            Me.MyTextBox.Size = New System.Drawing.Size(104, 21)
            Me.MyTextBox.TabIndex = 1
            Me.MyTextBox.Text = ""
            '
            'PathBox
            '
            Me.PathBox.Location = New System.Drawing.Point(121, 57)
            Me.PathBox.Name = "PathBox"
            Me.PathBox.ReadOnly = True
            Me.PathBox.Size = New System.Drawing.Size(104, 21)
            Me.PathBox.TabIndex = 2
            Me.PathBox.Text = ""
            '
            'Submit
            '
            Me.Submit.Location = New System.Drawing.Point(255, 111)
            Me.Submit.Name = "Submit"
            Me.Submit.Size = New System.Drawing.Size(104, 21)
            Me.Submit.TabIndex = 3
            Me.Submit.Text = "确定"
            '
            'Label1
            '
            Me.Label1.Location = New System.Drawing.Point(33, 57)
            Me.Label1.Name = "Label1"
            Me.Label1.Size = New System.Drawing.Size(64, 18)
            Me.Label1.TabIndex = 4
            Me.Label1.Text = "选择路径"
            Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight
            '
            'Label2
            '
            Me.Label2.Location = New System.Drawing.Point(31, 111)
            Me.Label2.Name = "Label2"
            Me.Label2.Size = New System.Drawing.Size(72, 18)
            Me.Label2.TabIndex = 5
            Me.Label2.Text = "起始文件名"
            Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight
            '
            'MainBase
            '
            Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
            Me.ClientSize = New System.Drawing.Size(392, 190)
            Me.Controls.Add(Me.Label2)
            Me.Controls.Add(Me.Label1)
            Me.Controls.Add(Me.Submit)
            Me.Controls.Add(Me.PathBox)
            Me.Controls.Add(Me.MyTextBox)
            Me.Controls.Add(Me.MyButton)
            Me.Name = "MainBase"
            Me.Text = "批量文件命名"
            Me.ResumeLayout(False)

        End Sub

#End Region
        Private Sub MyButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyButton.Click
            Try
                MyFolderBrowserDialog = New FolderBrowserDialog
                MyFolderBrowserDialog.ShowDialog()
                PathBox.Text = MyFolderBrowserDialog.SelectedPath
            Catch ex As Exception
            End Try
        End Sub

        Private Sub Submit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Submit.Click
            Dim MyMessageBox As New MsgBoxResult
            MyMessageBox = MsgBox("确定要重命名么？", MsgBoxStyle.OKCancel, "真的么？")
            If MyMessageBox = MsgBoxResult.Cancel Then
                Return
            End If
            Try
                Dim mystrings As String() = Directory.GetFiles(PathBox.Text)
                Dim mystring As String
                Dim i As Integer = 0
                For Each mystring In mystrings
                    Rename(mystring, mystring.Substring(0, Len(PathBox.Text) + 1) + MyTextBox.Text + i.ToString + mystring.Substring(Len(mystring) - 4))
                    i = i + 1
                Next
                PathBox.Text = ""
                MyTextBox.Text = ""
            Catch ex As Exception
            End Try
        End Sub
    End Class
End Namespace

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