如何从vb.net中的另存为对话框中删除取消按钮？

Imports System.Windows.Forms

Public Class CustomSaveFileDialog
    Inherits SaveFileDialog

    Public Sub New()
        MyBase.New()
        Me.ShowHelp = False ' 隐藏帮助按钮
    End Sub

    Protected Overrides Function CreateParams() As CreateParams
        Dim cp As CreateParams = MyBase.CreateParams
        cp.Style = cp.Style And Not &H8 ' 移除WS_SYSMENU样式，隐藏系统菜单
        Return cp
    End Function
End Class

Dim saveDialog As New CustomSaveFileDialog()
saveDialog.ShowDialog()