private void button3_Click(object sender, EventArgs e)
{
panel3a.Controls.Clear();
AboutUS ap22 = new AboutUS();
ap22.Dock = DockStyle.Fill;
ap22.TopLevel = false;
ap22.TopMost = true;
ap22.AutoScroll = true;
ap22.FormBorderStyle = FormBorderStyle.None;
this.panel3a.Controls.Add(ap22);
ap22.Show();
}
private void button1_Click(object sender, EventArgs e)
{
AboutUS ab = new AboutUS();
ab.Show();
}