private void frmCategoriaRecord_FormClosing(object sender, FormClosingEventArgs e)
        {
            this.Hide();
            frmCategoria frm = new frmCategoria();

            frm.Show();
        }
        private void categoriaToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form Categorias = new frmCategoria();

            Categorias.MdiParent = this;
            Categorias.Show();
        }
        private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            DataGridViewRow dr = dataGridView1.SelectedRows[0];

            this.Hide();
            frmCategoria frm = new frmCategoria();

            // or simply use column name instead of index
            //dr.Cells["id"].Value.ToString();
            frm.Show();
            frm.txtID.Text            = dr.Cells[0].Value.ToString();
            frm.txtNomeCategoria.Text = dr.Cells[1].Value.ToString();
            frm.btnDeletar.Enabled    = true;
            frm.btnAtualizar.Enabled  = true;
            frm.txtNomeCategoria.Focus();
            frm.btnSalvar.Enabled = false;
        }