Subj : Re: Creating dll
To   : borland.public.cpp.borlandcpp
From : JaimeS
Date : Thu Jul 15 2004 10:47 am

Hi

To export a class from a DLL you need to put the __declspec(dllexport) in
the class, for example

class __declspec(dllexport) TRList
{
   ...
};

and in your code that use the class in the DLL, you neet to import the
class:

class __declspec(dllimport) TRList
{
   ...
};

A good idea is to use a conditional #define to ensure that in the DLL you
are exporting the class, and in your code you are importing the class:

 #ifdef  MYDLL
   #define MYDLL_EXPORT __declspec(dllexport)
 #else
   #define MYDLL_EXPORT  __declspec(dllimport)
 #endif

and declare the class in this form:

class MYDLL_EXPORT  TRList
{
};

in the DLL project the only thing that you need to do is declare a
preprocessor variable with the option -D MYDLL_EXPORT

JaimeS



"Itay" <itay@work.com> wrote in message
news:40f67b55@newsgroups.borland.com...
>
> MyProject is quite big ( lot's of files), the problem is that compiling
> takes a lot of time.
> I want to transform some of my files into dll's so I won't have to compile
> to hole project.
> I have a Unit (MyUnit) inside that unit there is class - class myClass :
> public myFather
> (myFather is a part of myProject )
> i want to be able to create an object from myClass. and to use all the
> public functions.
> I have tried to use the dll wizard but i couldnt export that class.
> where can i get an exemple of how to export a class. what do i need to
> include and where.
>
> Thank you.
> Itay
>
>

.