Implemented NtYieldExecution.
diff --git a/include/winternl.h b/include/winternl.h
index 21b6428..5dc816e 100644
--- a/include/winternl.h
+++ b/include/winternl.h
@@ -1371,6 +1371,7 @@
NTSTATUS WINAPI NtWaitForMultipleObjects(ULONG,const HANDLE*,BOOLEAN,BOOLEAN,const LARGE_INTEGER*);
NTSTATUS WINAPI NtWriteFile(HANDLE,HANDLE,PIO_APC_ROUTINE,PVOID,PIO_STATUS_BLOCK,const void*,ULONG,PLARGE_INTEGER,PULONG);
NTSTATUS WINAPI NtWriteVirtualMemory(HANDLE,void*,const void*,SIZE_T,SIZE_T*);
+NTSTATUS WINAPI NtYieldExecution(void);
void WINAPI RtlAcquirePebLock(void);
BYTE WINAPI RtlAcquireResourceExclusive(LPRTL_RWLOCK,BYTE);