class CThreadPool

 {

 public: 

     template <typename T>

     static void QueueUserWorkItem(void (T::*function)(void),

         T *object, ULONG flags = WT_EXECUTELONGFUNCTION)

     {

         typedef std::pair<void (T::*)(), T *> CallbackType;

         std::auto_ptr<CallbackType> p(new CallbackType(function, object)); 

         if (::QueueUserWorkItem(ThreadProc<T>, p.get(), flags))

         {

             // The ThreadProc now has the responsibility of deleting the pair.

             p.release();

         }

         else

         {

             throw GetLastError();

         }

     } 

 private: 

     template <typename T>

     static DWORD WINAPI ThreadProc(PVOID context)

     {

         typedef std::pair<void (T::*)(), T *> CallbackType; 

         std::auto_ptr<CallbackType> p(static_cast<CallbackType *>(context)); 

         (p->second->*p->first)();

         return ;

     }

 };