public frmObrasSocialesAE(frmObrasSociales frm)
 {
     InitializeComponent();
     this.frm = frm;
 }
        private void obrasToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmObrasSociales frm = new frmObrasSociales();

            frm.ShowDialog(this);
        }