Class를 dllexport하니 C4251이 발생합니다.

/* Mailslot.h */
#ifdef MAILBOX_DLL_IMPL
#define DLLEXPORT __declspec(dllexport)
#else
#define DLLEXPORT __declspec(dllimport)
#endif
 
#define DEFAULT_MAILSLOT_NAME TEXT("\\\\.\\MailSlot\\")
 
class IMailslot {
public:
    virtual BOOL Create() = 0;
    virtual BOOL Connect() = 0;
    virtual BOOL CloseMailslot() = 0;
};
 
DLLEXPORT IMailslot *createMailslot(LPCTSTR name);
DLLEXPORT void destroyMailslot(IMailslot *mailslot);

/* Mailslot.cpp */
#include <windows.h>
...
 
#define MAILSLOT_DLL_IMPL
#include "Mailslot.h"
 
....
 
class MailslotImpl : public IMailslot {
    std::string<TCHAR> name;
public:
    MailslotImpl(LPCTSTR name) : name(name) {}
    ~MailslotImpl();
    BOOL Create();
    BOOL Connect();
    BOOL CloseMailslot();
};
 
 
MailslotImpl::~MailslotImpl() {
    /* ... */
}
 
BOOL MailslotImpl::Create() {
    /* ... */
}
 
BOOL MailslotImpl::Connect() {
    /* ... */
}
 
BOOL MailslotImpl::CloseMailslot() {
    /* ... */
}
 
 
IMailslot *createMailslot(LPCTSTR name) {
    return new MailslotImpl(name);
}
 
void destroyMailslot(IMailslot *mailslot) {
    delete static_cast<MailslotImpl*>(mailslot);
}

/* MailslotClient.cpp */
#include "Mailslot.h"
 
int main(int argc, const char **argv) {
    IMailslot *mailslot = createMailslot(DEFAULT_MAILSLOT_NAME);
    mailslot->Connect();
    mailslot->CloseMailslot();
    destroyMailslot(mailslot);
    return 0;
}