public UserControl1()
 {
     InitializeComponent();
     principal = new Principal();
     agre      = new PanelAgregar(this);
     rep       = new PanelReportes(this);
 }
 private void btnReportes_Click(object sender, EventArgs e)
 {
     rep = new PanelReportes(this);
     rep.Show();
 }