当我通过vb.net代码插入组合框时,如何使其具有事件?

嗨,我对vb.net还是个新手… 对于有按钮的表单(按钮1),我有以下代码。 当我按下这个按钮时,它会添加一个带有一些值的组合框(每次按下按钮时,它会在下面添加一个新的组合框)。 如何设置和事件,以便更改组合框时,文本框将显示在其右侧? 基本上,我考虑的是根据在每个组合框中选择的内容采取不同的行为。

Public Class frmEditor
    Private Const rowHeight = 25
    Dim datarows() As Action
    Dim currentrow As Integer
    Dim starttop As Integer
    Private Sub frmEditor_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        currentrow = 1
        starttop = 20
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        CreateRow()
        currentrow = currentrow + 1
        starttop = starttop + rowHeight
    End Sub

    Private Sub CreateRow()
        Dim newrow As Action = New Action()
        ReDim Preserve datarows(currentrow)
        datarows(currentrow) = newrow
        datarows(currentrow).newAction(15, starttop, currentrow)
    End Sub

End Class

Public Class Action
    Private cbo As New ComboBox()

    Public Sub newAction(ByVal xleft As Integer, ByVal ytop As Integer, ByVal nrow As Integer)
        cbo.Top = ytop
        cbo.Left = xleft
        cbo.Visible = True
        cbo.Items.Add("Test1")
        cbo.Items.Add("Test2")
        frmEditor.Controls.Add(cbo)

    End Sub
End Class