Re: [Dev-C++] Exporting a Class in C++....

[Per W. <pw...@ia...>]

The normal way to create new classs in a DLL is to:

- declare a (possibly abstract) base class in main program.
- declare a new class inherriting from the base class in the DLL.
- export a object-create function in the DLL.

The main program then calls the create function in the DLL, and receives a
pointer to the new subclassed object.

Since virtual method calls are decided at run-time, all virtual calls will
go to the new class implementation. Inline and non-virtual methods will
use tme methods available at compile time, i.e. the code in the main 
program.

/PWM


On Tue, 6 Aug 2002, Raghunath Marella.S wrote:

> Hi there,
> 
> I am trying to export a class in a DLL. I have
> declared that class as __declspec(dllexport). I am
> trying to link this DLL dynamicall from an executable.
> With the help of a example in MSDN, i declared a
> similar class in executable, with same name and also
> the same funcitons which are required to call from
> executable. This class in 'exe' was declared
> __declspec(dllimport). 
> 
> NOw a object for this class has been declared in 'exe'
> and  calling member functions thro object. 
> 
> The DLL was loaded by LoadLibrary(..) call. 
> 
> WIll any one let me know is the above procedure
> sufficient or something else also to be done. 
> 
> thanks & regards,
> Raghunath
> 
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