private void obraToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frm_Obras frm = new frm_Obras();

            frm.Show();
        }
        private void btn_cad_Obra_Click(object sender, EventArgs e)
        {
            frm_Obras frm = new frm_Obras();

            frm.Show();
        }