private void button4_Click_1(object sender, EventArgs e)
{
pastpapers ps = new pastpapers();
ps.Show();
this.Hide();
}
private void button16_Click(object sender, EventArgs e)
{
pastpapers pa = new pastpapers();
this.Hide();
pa.Show();
}
private void button2_Click(object sender, EventArgs e)
{
pastpapers op = new pastpapers();
op.Show();
this.Hide();
}