AkaneMail.MailEditorForm.Application_Idle C# (CSharp) Method

        private void Application_Idle(object sender, EventArgs e)
        {
            DoInActiveTextBox(ctrl =>
            {
                var isctrlSelected = ctrl.SelectionLength > 0;
                this.buttonCut.Enabled = isctrlSelected;
                this.buttonCopy.Enabled = isctrlSelected;
            });

            this.buttonPaste.Enabled = Clipboard.ContainsData(DataFormats.Text);
        }