private void Form1_Load(object sender, EventArgs e)
{
popupSearchBox.Location = new Point(textBox1.Location.X, textBox1.Location.Y + textBox1.Height + 3);
popupSearchBox.Visible = false;
popupSearchBox.Width = textBox1.Width;
// Must add the navigator to the Form itself.
this.Controls.Add(popupSearchBox);
// Add to the contain first then bring to front, or it will not have effect.
popupSearchBox.BringToFront();
}
