Como posso acessar a propriedade do meu componente através de outra classe?

  TMyComponent = class(TComponent)
  private
    FConnection : TZConnection;
    ...
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Connection : TZConnection read FConnection write SetConnection;
  end;

...  

procedure TMyTableNamePropertyEditor.GetValueList(List: TStrings);
begin
  FConnection.GetTableNames();  //err aqui 
end;