TFPgtkToolbar.AppendElement

public function TFPgtkToolbar.AppendElement(

  ButtonType: TGtkToolbarChildType;

  PrevRadioBut: TFPgtkWidget;

  Text: string;

  TooltipText: string;

  TooltipPrivate: string;

  Icon: TFPgtkWidget;

  CallBack: TFPgtkSignalFunction;

  data: pointer

):TFPgtkWidget;