private void categoriasToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frm_Categoria frm = new frm_Categoria();

            frm.Show();
        }
        private void btn_cadCategorias_Click(object sender, EventArgs e)
        {
            frm_Categoria frm = new frm_Categoria();

            frm.Show();
        }