VC编译报错

出错提示：  
  E:/vcprogram/OpenGL/MFCLetter/MFCLetterView.cpp(127)   :   error   C2664:   'gluTessCallback'   :   cannot   convert   parameter   3   from   'void   (unsigned   int)'   to   'void   (__stdcall   *)(void)'  
   
  E:/vcprogram/OpenGL/MFCLetter/MFCLetterView.cpp(128)   :   error   C2664:   'gluTessCallback'   :   cannot   convert   parameter   3   from   'void   (const   double   *)'   to   'void   (__stdcall   *)(void)'   
   
改正：(void(__stdcall*)())