src/java.desktop/windows/native/libawt/windows/awtmsg.h

*** 43,52 ****
--- 43,56 ----
  
  #ifndef WM_MOUSEWHEEL
  #define WM_MOUSEWHEEL                   0x020A
  #endif //WM_MOUSEWHEEL
  
+ #ifndef WM_MOUSEHWHEEL
+ #define WM_MOUSEHWHEEL                  0x020E
+ #endif //WM_MOUSEHWHEEL
+ 
  #ifndef WHEEL_DELTA
  #define WHEEL_DELTA                     120
  #endif //WHEEL_DELTA
  
  #ifndef WHEEL_PAGESCROLL