wrapper.d

module wrapper;

export {
    extern (Windows)
    void* DirectInput8Create(void* hinst, uint dwVersion, void* riidltf, void** ppvOut, void* punkOuter)
    {
        asm {
            naked;
            jmp DirectInput8Create_Hook; // steam overlay compatibility
        }
    }
}

extern (Windows)
void* DirectInput8Create_Hook(void* hinst, uint dwVersion, void* riidltf, void** ppvOut, void* punkOuter)
{
    if (!DirectInput8Create_Real)
        return null;
    return DirectInput8Create_Real(hinst, dwVersion, riidltf, ppvOut, punkOuter);
}

__gshared {
    extern (Windows)
    void* function(void* hinst, uint dwVersion, void* riidltf, void** ppvOut, void* punkOuter) DirectInput8Create_Real = null;
}