Private Sub AnnulerStripButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AnnulerStripButton.Click If RichTextBox1.CanUndo Then RichTextBox1.Undo() End Sub Private Sub retablirStripButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles retablirStripButton.Click If RichTextBox1.CanRedo Then RichTextBox1().Redo() End Sub