Panel won't show up in UserControl

Hello,

I want to add a Panel to a UserControl but it's not showing up.

Here's my code:

Adding the UserControl (to another UserControl -- i.e. QuickStartControl):

Code:

---

    public partial class QuickStartControl : UserControl
    {
        public QuickStartControl()
        {
            InitializeComponent();
            this.Load += new EventHandler(QuickStartControl_Load);
        }

        private void QuickStartControl_Load(object sender, EventArgs e)
        {
            MasterFlowLayoutPanel masterFlow = new MasterFlowLayoutPanel();
            masterFlow.Dock = DockStyle.Top;
            masterFlow.BackColor = Color.Black;
            this.Controls.Add(masterFlow);
        }
    }

---

Adding the panel to the MasterFlowLayoutPanel UserControl:

Code:

---

    public partial class MasterFlowLayoutPanel : UserControl
    {
        public MasterFlowLayoutPanel()
        {
            InitializeComponent();
            this.Load += new EventHandler(MasterFlowLayoutPanel_Load);
        }

        private void MasterFlowLayoutPanel_Load(object sender, EventArgs e)
        {
            AddInitialSafeguardFlowLayoutPanel();
        }

        public void AddInitialSafeguardFlowLayoutPanel()
        {
            Panel p = new Panel();
            p.Location = new Point(0, 0);
            p.Size = new Size(100, 100);
            p.Dock = DockStyle.Fill;
            p.Anchor = AnchorStyles.Left | AnchorStyles.Right;
            p.BackColor = Color.Red;
            this.Controls.Add(p);
        }
    }

---

The panel won't show up. Any idea why?

Do you have to add the control in the OnLoad? Could you add it from the form designer?