[KOOL]

например так

Код:

var poschange:boolean;
...
procedure TfrmMyBrowser.TrackBar2MouseDown(Sender: TObject;X,Y:integer;Button:TMouseButton);
begin
poschange:=true;
end;

procedure TfrmMyBrowser.TrackBar2MouseUp(Sender: TObject;X,Y:integer;Button:TMouseButton);
begin
poschange:=false;
end;

procedure TfrmMyBrowser.TrackBar2Change(Sender: TObject);
var
a: integer;
begin
if poschange then
begin
Timer2.Enabled := False;
MediaPlayer1.Pause;
MediaPlayer1.Position:=TrackBar2.Position;
a := MediaPlayer1.Position;
sec := a div 1000 mod 60;
min := a div 60000;
Timer2.Enabled := True;
MediaPlayer1.Play;
end;
end;