[^SmileY]

PHP Code:

// Result 0: No players
// Result 1: Attacker is inside smoke
// Result 2: Victim is inside smoke
// Result 3: Both are inside smoke
int CStats::InsideSmoke(CBasePlayer* Player, CBasePlayer* Target, float Distance) // 115.0f
{
    int Result = 0;

    if (g_ReGameFuncs)
    {
        CGrenade* pEntity = nullptr;

        while ((pEntity = (CGrenade*)g_ReGameFuncs->UTIL_FindEntityByString((CBaseEntity*)pEntity, "classname", "grenade")))
        {
            if (pEntity->m_bDetonated)
            {
                if (pEntity->m_SGSmoke > 0)
                {
                    if ((pEntity->m_vSmokeDetonate - Player->edict()->v.origin).IsLengthLessThan(Distance))
                    {
                        Result += 1;
                    }

                    if ((pEntity->m_vSmokeDetonate - Target->edict()->v.origin).IsLengthLessThan(Distance))
                    {
                        Result += 2;
                    }

                    if (Result)
                    {
                        return Result;
                    }
                }
            }
        }
    }

    return Result;
} 


Final code for detect inside, still need a check to behind smoke frags
Thanks for help.