program asynccall; {$mode objfpc}{$H+} uses {$IFDEF UNIX}{$IFDEF UseCThreads} cthreads, {$ENDIF}{$ENDIF} Interfaces, // this includes the LCL widgetset Forms { you can add units after this }, uasynccall; begin Application.Title:='AsyncCall'; Application.Initialize; Application.CreateForm(TForm1, Form1); Application.Run; end.