c++ - error C2440: 'type cast' : cannot convert from 'overloaded-function' to -


i have piece of code worked fine on previous projet. part of copied working demo project , don't know how can have error on new project now. when compiling, have following error :

1>d:\visual studio 2012\netsdk_poc\mfc_netsdk2\mfc_netsdk2\netsdkfunctions.cpp(33): error c2440: 'type cast' : cannot convert 'overloaded-function' 'fdisconnect'

the code :

class cnetsdkfunctions{  void __stdcall disconnectbackcallfunc(long lloginid, char *pchdvrip,                                    long ndvrport, dword dwuser) {     cnetsdkfunctions* pthis = (cnetsdkfunctions*)dwuser;     if (pthis == null)     {         assert( false );         return ;     }     //pthis->reconnect(lloginid, pchdvrip, ndvrport); }  bool cnetsdkfunctions::initsdk() {     long m_playerhandle;      h264_dvr_getlasterror();     h264_dvr_init(null, 0);              //here :     bool logresult = h264_dvr_init( (fdisconnect) disconnectbackcallfunc, (dword) );    ....   }

and fdisconnect definition :

typedef void (call_method *fdisconnect)(long lloginid, char *pchdvrip, long ndvrport, unsigned long dwuser);


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