typedef HRESULT (*PFRIL_Initialize)(DWORD dwIndex, RILRESULTCALLBACK pfnResult, RILNOTIFYCALLBACK pfnNotify, 
                           DWORD dwNotificationClasses, DWORD dwParam, HANDLE *phRil); 
typedef HRESULT (*PFRIL_DeInitialize)(HANDLE hRil); 
typedef HRESULT (*PFRIL_GetRegistrationStatus)(HANDLE hRil); 
typedef HRESULT (*PFRIL_GetCellTowerInfo)(HANDLE hRil); 
typedef HRESULT (*PFRIL_DevSpecific)(HANDLE hRil, BYTE*params, DWORD dwSize); 

extern PFRIL_Initialize RIL_Initialize; 
extern PFRIL_GetRegistrationStatus RIL_GetRegistrationStatus; 
extern PFRIL_GetCellTowerInfo RIL_GetCellTowerInfo; 
extern PFRIL_DevSpecific RIL_DevSpecific;