i am trying to include direct sound in my program but when i compile it it gives the following errors Code: [Linker error] undefined reference to`DirectSoundManager::Initialize(HWND__*)' [Linker error] undefined reference to `DirectSoundBuffer::DirectSoundBuffer()' [Linker error] undefined reference to `DirectSoundBuffer::~DirectSoundBuffer()' and more like these. can anyone solve this problem i have included the dsound.h. also in project properties i have have added dsound.lib in parameters but still getting theses problems Please solve this