private void btnAdmin_Click(object sender, EventArgs e)
        {
            FormAdmin fa = new FormAdmin();

            fa.Show();
            this.Hide();
        }
        private void btnKembali_Click(object sender, EventArgs e)
        {
            string       peringatan = "Apakah kamu yakin ingin kembali ke form admin???";
            DialogResult dr         = MessageBox.Show(peringatan, "Konfirmasi Kembali", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation);

            if (dr == DialogResult.Yes)
            {
                FormAdmin fa = new FormAdmin();
                fa.Show();
                this.Hide();
            }
        }