private void toolStripButton6_Click(object sender, EventArgs e)
        {
            frmSuprirEstoque f = new frmSuprirEstoque();

            CheckMdiChildren(f);
        }
        private void suprirEstoqueToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmSuprirEstoque f = new frmSuprirEstoque();

            CheckMdiChildren(f);
        }