private void agpic_Click(object sender, EventArgs e)
{
agents ag = new agents();
ag.TopLevel = false;
cntpnl.Controls.Clear();
cntpnl.Controls.Add(ag);
ag.Show();
}
private void agentbtn_Click(object sender, EventArgs e)
{
arrow1.Visible = false;
arrow2.Visible = false;
arrow3.Visible = false;
arrow4.Visible = false;
arrow5.Visible = true;
arrow6.Visible = false;
arrow7.Visible = false;
arrow8.Visible = false;
arrow9.Visible = false;
agents ag = new agents();
ag.TopLevel = false;
cntpnl.Controls.Clear();
cntpnl.Controls.Add(ag);
ag.Show();
}