private void button3_Click(object sender, EventArgs e)
        {
            FRM_Inventario wndInventario = new FRM_Inventario();

            wndInventario.ShowDialog(this);
        }
        private void inventarioToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FRM_Inventario wndInventario = new FRM_Inventario();

            wndInventario.ShowDialog(this);
        }