DWORD WINAPI RtlRunOnceExecuteOnce(RTL_RUN_ONCE *once, PRTL_RUN_ONCE_INIT_FN func, void *param, void **context)
BOOL NTAPI InitOnceExecuteOnce(INIT_ONCE *once, PINIT_ONCE_FN func, void *param, void **context)
BOOL(WINAPI * PINIT_ONCE_FN)(_Inout_ PINIT_ONCE InitOnce, _Inout_opt_ PVOID Parameter, _Outptr_opt_result_maybenull_ PVOID *Context)
RTL_RUN_ONCE_INIT_FN * PRTL_RUN_ONCE_INIT_FN