DLL To C

[Sora-Kun]

Hi all,
  I want if it's possible to create DLLs in Lazarus, and then use them in C ?
Because I created a simple one, but C can not find any function, actually, I opened the dll with a dll file viewer, and there is no function/variable located.

this the example that i tried:

Code: [Select]

library project1;

{$mode objfpc}{$H+}

uses
  Classes
  { you can add units after this };

function strtoint(s: string): integer;
var x, e: integer;
begin
   val(s, x, e);
   strtoint := x;
end;


begin

end.

Thanks a lot.
Cheers,
KingXerXes

[felipemdc]

You forgot the "exports" section. See the documentation:

http://www.freepascal.org/docs-html/prog/progse55.html

http://wiki.freepascal.org/Lazarus/FPC_Libraries

[BigChimp]

Have a look at the FPC documentation, e.g. unit dynlib, I believe there's a discussion on using FPC DLLS with C (use of stdcall etc)

Here's info on writing a DLL for Apache that might be applicable, too: http://wiki.lazarus.freepascal.org/FPC_and_Apache_Modules
Same for C#/.Net/VB.Net/Oxygene:
http://wiki.lazarus.freepascal.org/Using_Pascal_Libraries_with_.NET_and_Mono

Strange that there I can't find anything on the wiki for C/C++ - probably searching on the wrong terms...
Oh, here's some more info:
http://wiki.lazarus.freepascal.org/Lazarus/FPC_Libraries

[Sora-Kun]

Hi all,

   Thanks a lot people actually it's not about forget it's my 1st time with DLLs.
Thanks a lot.
Big hug, KingXerXes.