In an application, how do you have a main function that is executed when the app

[vonskie]

In an application, how do you have a main function that is executed when the app loads?

[balazsszekely]

@vonskie

In an application, how do you have a main function that is executed when the app loads?

I suppose you're talk about a GUI application(File-->New-->Project-->Application). First take a look at the life cycle of a form: http://wiki.freepascal.org/Event_order#Lazarus_documentation . You can choose the first three event to call your "main function". Each event is explained in details, you can pick the one who fits your needs best.

[minesadorada]

Here is a typical LPR (project) file.

Code: Pascal  [Select][+][-]

1. program Project1;
2.  
3. {$mode objfpc}{$H+}
4.  
5. uses
6.   {$IFDEF UNIX}{$IFDEF UseCThreads}
7.   cthreads,
8.   {$ENDIF}{$ENDIF}
9.   Interfaces, // this includes the LCL widgetset
10.   Forms, unit1
11.   { you can add units after this };
12.  
13. {$R *.res}
14.  
15. begin
16.   RequireDerivedFormResource:=True;
17.   Application.Initialize;
18.   Application.CreateForm(TForm1, Form1);
19.   Application.Run;
20. end.      

As you can see it starts with the keyword program and has a uses section which includes the bare minimum needed to run a GUI application.

It then runs code between the begin and end. keywords, which would be the equivalent of a main() function perhaps.  The event loop is contained in the Application object.