参考:https://blog.csdn.net/karlxzy/article/details/42170419

 

在默认情况下，64位环境运行32位程序，会启用重定向，

比如 调用CreateFile时，系统会把system32文件夹重定向到Syswow64等等。

但是有些时候需要访问system32文件夹的时候就需要关闭重定向。

MS已经提供了一组函数用来控制重定向：

Wow64EnableWow64FsRedirection
Wow64DisableWow64FsRedirection
Wow64RevertWow64FsRedirection

用法在MSDN里面有DEMO：

 

1.   #define _WIN32_WINNT 0x0501
2.   #include <Windows.h>
3.    
4.   void main()
5.   {
6.   HANDLE hFile = INVALID_HANDLE_VALUE;
7.   PVOID OldValue = NULL;
8.    
9.   // Disable redirection immediately prior to the native API
10.   // function call.
11.   if( Wow64DisableWow64FsRedirection(&OldValue) )
12.   {
13.   // Any function calls in this block of code should be as concise
14.   // and as simple as possible to avoid unintended results.
15.   hFile = CreateFile(TEXT("C:\\Windows\\System32\\Notepad.exe"),
16.   GENERIC_READ,
17.   FILE_SHARE_READ,
18.   NULL,
19.   OPEN_EXISTING,
20.   FILE_ATTRIBUTE_NORMAL,
21.   NULL);
22.    
23.   // Immediately re-enable redirection. Note that any resources
24.   // associated with OldValue are cleaned up by this call.
25.   if ( FALSE == Wow64RevertWow64FsRedirection(OldValue) )
26.   {
27.   // Failure to re-enable redirection should be considered
28.   // a criticial failure and execution aborted.
29.   return;
30.   }
31.   }
32.    
33.   // The handle, if valid, now can be used as usual, and without
34.   // leaving redirection disabled.
35.   if( INVALID_HANDLE_VALUE != hFile )
36.   {
37.   // Use the file handle
38.   }
39.   }