private void buttonAdd_Click(object sender, EventArgs e) { ABM_de_Cliente.CreateGuest frm = new FrbaHotel.ABM_de_Cliente.CreateGuest(); var result = frm.ShowDialog(); if (result == DialogResult.OK && frm.inserted != 0) { this.id_guest = frm.inserted; DialogResult = DialogResult.OK; this.Close(); } }