private void cadastroDeClienteToolStripMenuItem_Click(object sender, EventArgs e) { if (cliente == null) { cliente = new frmCdstrClnt(); cliente.MdiParent = this; cliente.Closed += delegate { cliente = null; }; cliente.Show(); } }
private void cadastroDeVendasToolStripMenuItem_Click(object sender, EventArgs e) { if (MessageBox.Show("Cliente já cadastrado?", "Cadastrar Cliente", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes) { if (vendas == null) { vendas = new frmCdstrVnds(); vendas.MdiParent = this; vendas.Closed += delegate { vendas = null; }; vendas.Show(); } } else { if (cliente == null) { cliente = new frmCdstrClnt(); cliente.MdiParent = this; cliente.Closed += delegate { cliente = null; }; cliente.Show(); } } }