帮忙看看一个关于线程的错误

我在程序中开了一个工作线程如下
void ReadBook(CBook *pBook)
{AfxBeginThread(ReadBookThread,(LPVOID)pBook); }                UINT ReadBookThread(LPVOID pParam){                                                                  
CBook *pBook = (CBook *)pParam;……………………                                                          return 0;         
}                                                                               
但编译的时候总通不过，报告错误如下：                                            
error C2665: 'AfxBeginThread' : none of the 2 overloads can convert parameter 1 from type 'unsigned int (void *)'
查了msdn，在网上也搜了半天，还是没搞定这个错误，大家看看是怎么回事啊？          
谢谢！