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function MessageDlgEx(const Msg: string; DlgType: TMsgDlgType;
  Buttons: TMsgDlgButtons; Captions: array of string;
  HelpCtx: Longint) : integer;
var
  aMsgDlg      : TForm;
  i            : integer;
  dlgButton    : TButton;
  CaptionIndex : integer;
begin
                                                 { Dialog erzeugen             }
  aMsgDlg      := CreateMessageDialog(Msg, DlgType, Buttons);

  try
    CaptionIndex := 0;
                                                 { Über alle Objekte auf dem   }
                                                 { Dialog iterieren            }
    for i := 0 to aMsgDlg.ComponentCount - 1 do begin
                                                 { Wenn es ein Button ist,     }
                                                 { dann ...                    }
      if (aMsgDlg.Components[i] is TButton) then begin
        dlgButton := TButton(aMsgDlg.Components[i]);
        if CaptionIndex > High(Captions) then
          break;
                                                 { ... schreibe Beschriftung   }
                                                 { entsprechend Caption- Array }
        dlgButton.Caption := Captions[CaptionIndex];
        inc(CaptionIndex);
      end;
    end;

    aMsgDlg.HelpContext := HelpCtx;
    result              := aMsgDlg.ShowModal;
  finally
    aMsgDlg.Free;
  end;
end;