From 5f69305fc56e333a346388e7abf357dbbcdd4958 Mon Sep 17 00:00:00 2001
From: UnknownObject <38148526+UnknownObject000@users.noreply.github.com>
Date: Tue, 23 Aug 2022 23:25:06 +0800
Subject: [PATCH] Update README.md

---
 README.md | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 919b421..b0bb4c2 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,28 @@
 # NTV04_NtShutdownSystem
-NTAPI快速关闭计算机视频源代码，用于演示未公开的AP
+NTAPI快速关闭计算机视频源代码，用于演示未公开的API - NtShutdownSystem
+
+## 关于NtShutdownSystem
+
+### 函数原型
+```c++
+DWORD NtShutdownSystem(SHUTDOWN_ACTION Action);
+```
+
+### 函数指针类型
+```c++
+typedef DWORD(WINAPI* typeNtShutdownSystem)(SHUTDOWN_ACTION Action);
+```
+
+### 未导出类型
+ - SHUTDOWN_ACTION
+```c++
+typedef enum _SHUTDOWN_ACTION
+{
+    ShutdownNoReboot,
+    ShutdownReboot,
+    ShutdownPowerOff
+} SHUTDOWN_ACTION;
+```
+
+### 所在DLL
+ - ntdll.dll