private void btnplaylist_Click(object sender, EventArgs e)
{
if (songList == null)
{
songList = new frmsonglist();
songList.FormClosed += songList_FormClosed;
songList.Show();
}
else
{
songList.Activate();
}
}
void songList_FormClosed(object sender, FormClosedEventArgs e)
{
songList = null;
}