Thread: Evil dll's

  1. #1
    Banned master5001's Avatar
    Join Date
    Aug 2001
    Visalia, CA, USA

    Evil dll's

    How would I go about making a class internal to a dll? To clarify, how do I make a class that would not go into the definition file and not be part of the library file?

    Here is a simplified example of what I want:

    class MyClass {
        void *MyFunc1(int, int)
    //assume that the class has been defined
    //avoid name-mangling
    extern "C" {
    //c functions that I want the dll to export
    void *DLLEXPORT something(int i) {
        MyClass stuff;
        return  stuff.MyFunc1(i, 7);
    In the dll I am working on I do not what any internal classes to be exported, however, they are anyway. I am using mingw 3.2.

  2. #2
    Guest Sebastiani's Avatar
    Join Date
    Aug 2001
    Waterloo, Texas
    Did you try making the function private?
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
        return std::pow
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;

  3. #3
    Registered User
    Join Date
    Nov 2001
    Here is one tutorial on basic DLL implementation.


  4. #4
    Banned master5001's Avatar
    Join Date
    Aug 2001
    Visalia, CA, USA
    Well I actually figured it out a very shortly after posting this. I found using the --no-export-all-symbols option does the trick fine since it will only export functions/classes that have been explicitly been declared as a dll export. I'll look at the link anyway, who knows I may learn something.

  5. #5
    It's full of stars adrianxw's Avatar
    Join Date
    Aug 2001
    Remember also that a DLL can have a "main()" function, called, oddly enough, DllMain() in which you can initialise and set things up for internal use ny the .dll's public and private functions.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

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