以下示例代码展示如何调用系统的文件夹选择对话框：
Private Function SelectFolder(ByVal Describe As String, Optional ByVal ShowNewFolder As Boolean = True) As String
Using nOpen As New System.Windows.Forms.FolderBrowserDialog()
nOpen.Description = Describe
nOpen.ShowNewFolderButton = ShowNewFolder
nOpen.ShowDialog()
Return nOpen.SelectedPath
End Using
End Function
调用方式：
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim _selectedFolder As String = SelectFolder("请选择安装目录", True) '显示选择安装目录界面，同时允许创建新文件夹
MsgBox(_selectedFolder)
End Sub Private Function SelectFolder(ByVal Describe As String, Optional ByVal ShowNewFolder As Boolean = True) As String
Using nOpen As New System.Windows.Forms.FolderBrowserDialog()
nOpen.Description = Describe
nOpen.ShowNewFolderButton = ShowNewFolder
nOpen.ShowDialog()
Return nOpen.SelectedPath
End Using
End Function
效果图：