private void Button13_Click(object sender, System.EventArgs e)
{
int left = 0;
int right = 0;
TStreamTime startpos = new TStreamTime();
TStreamTime endpos = new TStreamTime();
player.GetPlayerVolume(ref left, ref right);
player.GetPosition(ref startpos);
endpos.sec = System.Convert.ToUInt32(startpos.sec + 5);
player.SlideVolume(TTimeFormat.tfSecond, ref startpos, left, right, TTimeFormat.tfSecond, ref endpos, 100, 100);
}