private void button2_Click(object sender, EventArgs e)
        {
            FormSupplier fs = new FormSupplier();

            fs.Show();
            this.Hide();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            con.Open();
            String       printah = "DELETE FROM supplier WHERE nama='" + textBox1.Text + "'";
            OleDbCommand cmd     = new OleDbCommand(printah, con);

            cmd.ExecuteNonQuery();
            con.Close();
            MessageBox.Show("Data Berhasil Dihapus");

            //back to FromCRUD
            con.Dispose();
            this.Hide();
            FormSupplier book = new FormSupplier();

            book.ShowDialog();
        }