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Sponge99

Using DLL's

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I was just wondering if there is a simple way to use a DLL with MSVC++ 5.0. I created a DLL with just 1 class, to test it out, but realized I didn''t know how to "link" (or whatever you do with them) it. Is there a command to suck out my class from the DLL? Something like bring_in_DLL(dll_name); The class is called TEST, and only has a constructor and destructor, and a protected "int x". -Sponge99

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In order to link a class into a DLL you need to declare it with __declspec(dllexport) when linking the DLL and __declspec(dllimport) when linking the executable. ex:
A sample header file:

#ifdef _DLL
#define DLLEXP __declspec(dllexport)
#else
#define DLLEXP __declspec(dllimport)
#endif

class DLLEXP DllClass {
public:
DllClass();
~DllClass();
);

When compiling a DLL _DLL should be #defined and when compiling a executable _DLL should not be #defined. When linking the executable make sure that the DLL''s import library is linked as well.

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