How create a slider panel similar to Team View?

[flashcoder]

How create a slider panel (image attached) where can hide/show at any moment?

I already have half of solution:

Delphi-Quellcode:

procedure TForm1.btn1Click(Sender: TObject);
begin
  AnimateWindow(Panel1.Handle, 800, AW_SLIDE or AW_VER_NEGATIVE or AW_HIDE);
end;

procedure TForm1.btn2Click(Sender: TObject);
begin
  AnimateWindow(Panel1.Handle, 800, AW_SLIDE or AW_VER_POSITIVE or AW_ACTIVATE);
end;

Now i need insert something to right and below panel that when panel is hidden this thing is visible, to after show panel again through this (exactly like is in Team View) =>

http://prntscr.com/je15uq