program SingleThreadingExample1; {$mode objfpc}{$H+} uses {$IFDEF UNIX}{xx$IFDEF UseCThreads} cmem, cthreads, {$ENDIF}{xx$ENDIF} Interfaces, // this includes the LCL widgetset Forms { add your units here }, ProcessMessagesUnit1; begin Application.Initialize; Application.CreateForm(TForm1, Form1); Application.Run; end.