//botão encomendas de clientes
private void button1_Click(object sender, EventArgs e)
{
Encomendas encomendas = new Encomendas();
this.Hide();
encomendas.Show();
}
private void efeToolStripMenuItem_Click(object sender, EventArgs e)
{
Encomendas frm = new Encomendas();
frm.ShowDialog();
}