string reason = XtraInputBox.Show("Açıklama", "İptal Açıklamasını Giriniz", "");

            if (string.IsNullOrEmpty(reason) || string.IsNullOrWhiteSpace(reason) || reason == "")
            {
                MessageBox.Show("İptal İşleminde Açıklama Girmek Zorunludur.", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

//handle cancel
   private void PrintBarcodeDirectClick(object sender, EventArgs e)
        {
            XtraInputBoxArgs xtraInputBoxArgs = new XtraInputBoxArgs();
            xtraInputBoxArgs.Caption = "Miktar";
            xtraInputBoxArgs.Prompt = "Yazılacak Miktar Giriniz";
            xtraInputBoxArgs.DefaultButtonIndex = 0;
            xtraInputBoxArgs.Showing += XtraInputBoxArgs_Showing;
            xtraInputBoxArgs.DefaultResponse = "1";

            SpinEdit editor = new SpinEdit();
            editor.Properties.IsFloatValue = false;
            editor.Properties.Mask.EditMask = "N00";
            editor.Properties.Mask.MaskType = DevExpress.XtraEditors.Mask.MaskType.Numeric;
            editor.Properties.Mask.UseMaskAsDisplayFormat = true;
            xtraInputBoxArgs.Editor = editor;

            var qty = XtraInputBox.Show(xtraInputBoxArgs);
            var result = qty?.ToString();
            MessageBox.Show(result);


        }

        private void XtraInputBoxArgs_Showing(object sender, XtraMessageShowingArgs e)
        {
            e.Form.Text = "Miktar";
        }