private void circuloToolStripMenuItem_Click(object sender, EventArgs e)
{
c_circulo circulo = c_circulo.getInstancia();
frmCirculo frm_circulo = circulo.getFormulario();
frm_circulo.MdiParent = frm;
frm_circulo.Show();
}
private c_circulo()
{
frm_circulo = new frmCirculo();
listening();
}
