目前Code是這樣
Public Class Form1
    Private Sub ListBox1_SelectedIndexChanged(sender As Object, e As EventArgs)

    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        MsgBox(TextBox1.Text)
    End Sub

    Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
        MsgBox(TextBox1.Text)
    End Sub
End Class