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const
  right:Integer=0;
  up:Integer=1;
  left:Integer=2;
  down:Integer=3;

[..]

type

  [..]

  TArrow = class
  private
    PosX,PosY:Integer;
    Typ:Integer;
    Item:TBitMap;
  public
    constructor Create(const APath:String;ATyp:Integer);
    procedure Paint(APaintbox:TPaintbox;AEckeX,AEckeY:Integer);
  end;

[..]

constructor TArrow.Create(const APath:string;ATyp:Integer);
begin
  Typ:=ATyp;
  Item:=TBitMap.Create;
  Item.Width:=34;
  Item.Height:=32;
  case Typ of
  right:begin
      Item.LoadFromFile(APath+'Items\PfeilRechts.bmp');
      PosX:=593;
      PosY:=274;
    end;
  up:begin
      Item.LoadFromFile(APath+'Items\PfeilOben.bmp');
      PosX:=349;
      PosY:=100;
    end;
  left:begin
      Item.LoadFromFile(APath+'Items\PfeilLinks.bmp');
      PosX:=100;
      PosY:=275;
    end;
  down:begin
      Item.LoadFromFile(APath+'Items\PfeilUnten.bmp');
      PosX:=349;
      PosY:=446;
    end;
  end;
end;					

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  var a: integer;
begin
  a := 4;
  case a of
    1: Showmessage('a');
    2: Showmessage('b');
    3: Showmessage('c');
  end;
end;					

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RIGHT = 0;
UP = 1;
LEFT = 2;
DOWN = 3;