我在使用KeInitializeApc内核函数时使用这个函数的源码从xp下移植到win7下，结果参数报错
NTKERNELAPI
VOID KeInitializeApc ( 
                                  PKAPC Apc,
                                  PETHREAD Thread,        
                                  KAPC_ENVIRONMENT Environment,        
                                  PKKERNEL_ROUTINE KernelRoutine,
                                  PKRUNDOWN_ROUTINE RundownRoutine,
                                   PKNORMAL_ROUTINE NormalRoutine,
                                  KPROCESSOR_MODE ProcessorMode,
                                 PVOID NormalContext
                                          );

从第四个参数开始，报错说PKKERNEL_ROUTINE这个回调未定义，该怎么定义解决