private void label4_Click(object sender, EventArgs e)
        {
            moduloComprasCrearProvedor crearProvedor = new moduloComprasCrearProvedor();

            crearProvedor.compras = this;
            crearProvedor.ShowDialog();
        }
 private void label4_Click(object sender, EventArgs e)
 {
     moduloComprasCrearProvedor crearProvedor = new moduloComprasCrearProvedor();
     crearProvedor.compras = this;
     crearProvedor.ShowDialog();
     
 }