Public Class frmMsgbox
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Me.DialogResult = DialogResult.Yes
        Me.Close()
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Me.DialogResult = DialogResult.No
        Me.Close()
    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        Me.DialogResult = DialogResult.Cancel

    End Sub

    Public Sub set_text(msg As String, button1 As String, button2 As String, button3 As String)
        Me.TextBox1.Text = msg
        Me.Button1.Text = button1
        Me.Button2.Text = button2
        Me.Button3.Text = button3

    End Sub
End Class