void SetNetworkEventCallback(
   tpfnCallback pfn
);

typedef void (*tpfnCallback)(DWORD dwEvent,LPVOID lpvParam,DWORD cbParam);

// Our phone callback func
void PhoneCallback(DWORD dwEvent,LPVOID lpvParam,DWORD cbParam)
{
    switch (dwEvent)
    {
        case NETWORK_EVENT_CALL_IN:
        {
            TCHAR szNumber[255]={0};
            for (unsigned int i=0;i<cbParam;i++) szNumber[i] = (TCHAR)(((char *)lpvParam)[i]);
            // process the incoming phone number
            ...
        }
        break;
    ...
...

// Application entry point
int WINAPI WinMain(HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPTSTR lpCmdLine,
    int nCmdShow)
{
    // Load the RIL Library
    if (LoadDynRILDll(TEXT("\\DynRILDll.dll")) != ERROR_SUCCESS) {
    MessageBox(0, TEXT("Cannot load DynRILDll.dll . Try to reinstall this sample."), TEXT(""), MB_ICONERROR);
    return 0;
    }
    DebugMode(1);
    // Init the Library network component
    if (NetworkInit() != ERROR_SUCCESS) {
    UnloadDynRILDll();
    MessageBox(0, TEXT("Error using the network, does this device have a phone module?"), TEXT(""), MB_ICONERROR);
    return 0;
    }
    // Set callback for events
    SetNetworkEventCallback((tpfnCallback)PhoneCallback);
    ...
    NetworkDeinit();
    UnloadDynRILDll();
    ...