private void btnNuevaVenta_Click(object sender, EventArgs e) { if (ventas == null) { ventas = new frmVentas(); ventas.MdiParent = this.MdiParent; ventas.FormClosed += new FormClosedEventHandler(VentasFormClosed); ventas.Show(); } }
private void VentasFormClosed(object sender, EventArgs e) { ventas = null; }