[client21]

PHP Code:

class TEST : public SDKExtension
{
public:
    virtual bool SDK_OnMetamodLoad(ISmmAPI *ismm, char *error, size_t maxlength, bool late);
    void Hook_ClientActive(edict_t *pEntity, bool bLoadGame);
};

IServerGameClients *gameclients = NULL;

TEST g_Test;
SMEXT_LINK(&g_Test);

bool TEST::SDK_OnMetamodLoad(ISmmAPI *ismm, char *error, size_t maxlength, bool late)
{
    // Error    2    error C2065: 'id' : undeclared identifier
    PLUGIN_SAVEVARS();

    // Error    3    error C2065: 'maxlen' : undeclared identifier
    GET_V_IFACE_ANY(GetServerFactory, gameclients, IServerGameClients, INTERFACEVERSION_SERVERGAMECLIENTS);
    
    // Error    4    error C3861: '__SourceHook_FHAddIServerGameClientsClientActive': identifier not found
    SH_ADD_HOOK(IServerGameClients, ClientActive, gameclients, SH_MEMBER(this, &TEST::Hook_ClientActive), true);
    
    return true;
}

void TEST::Hook_ClientActive(edict_t *pEntity, bool bLoadGame)
{
    g_pSM->LogError(myself, "Hook_ClientActive(%d, %d)", gamehelpers->IndexOfEdict(pEntity), bLoadGame);
} 


Why?