private void pb_Exit_Click(object sender, EventArgs e)
{
DialogResult dr = MessageBox.Show("Are you sure to exit Contest?", "Close Contest", MessageBoxButtons.OKCancel);
if (dr == DialogResult.OK)
{
this.Close();
audience.Close();
questionScreen.Close();
axWindowsMediaPlayer1.Ctlcontrols.stop();
this.DialogResult = DialogResult.OK;
}
}