private void btn_createLink_Click(object sender, EventArgs e) { if (tb_link.TextLength > 0) { image = AssociateLink.QrLink(tb_link); form_qr.pb_preview.Image = image; form_qr.lb_direct.Visible = true; if (form_qr.pb_preview.Image == null) { form_qr.pb_preview.Image = Properties.Resources.fora_ar; form_qr.lb_direct.Visible = false; tb_link.Focus(); } } else { tb_link.Focus(); } }