Hi Jim, I m trying to understand the Key Framed Animation you have presented in your RPG book. I could''nt understand how u have decided to pass FALSE value in the SAnimation::Update() Can u briefly explain the logic behind it. Here is the code where i m facing problems //Update method of SAnimationSet SAnimation *pAnim; pAnim = m_pAnimation; while(pAnim) { if(!m_dwLength) pAnim->Update(0, FALSE); else if(dwTime >= m_dwLength && !pAnim->m_bLoop)-------->why pAnim->Update(m_dwLength, FALSE); else pAnim->Update((dwTime % m_dwLength), bSmooth); pAnim = pAnim->m_pNext; } Thanks