Exercice Visual Basic : ListBox

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Public Class Form1


    Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
        TextBox3.Text = ListBox1.Items.Count
        TextBox4.Text = ListBox1.SelectedIndex
        TextBox5.Text = ListBox1.Text
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ListBox1.Items.Clear()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        ListBox1.Items.Add(TextBox1.Text)
        TextBox1.Text = ""
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If Val(TextBox2.Text) <= ListBox1.Items.Count - 1 Then
            ListBox1.SelectedIndex = CInt(TextBox2.Text)
        Else
            MsgBox("L'élément rechercher est introuvable!")
        End If

    End Sub
End Class