Update README.md

README.md

@@ -1,2 +1,18 @@
 # NTV05_EasyPrivilegeGetter
-NTAPI简单提权函数视频源代码
+NTAPI简单提权函数视频源代码，用于演示未公开的NtAPI - RtlAdjustPrivilege
+
+## RtlAdjustPrivilege
+
+### 函数原型
+```c++
+UINT RtlAdjustPrivilege(ULONG Privilege, BOOL bEnablePrivilege, BOOL IsThreadPrivilege, PINT PreviousValue);
+```
+
+### 函数指针类型
+```c++
+typedef UINT(CALLBACK* typeRtlAdjustPrivilege)(ULONG, BOOL, BOOL, PINT);
+```
+
+### 所在DLL
+ - ntdll.dll
+