Exemple de code pour un programme C# 32 bits permettant d'accéder au registre 64 bits

1 using System;
  2  using System.Collections.Generic;
  3  using System.Linq;
  4  using System.Text;
  5  using Microsoft.Win32;
  6  using System.Runtime.InteropServices;
  7 
  8  namespace OperateRegistrationTable
  9 {
 10     class Programe
 11     {
 12         static void Main(string[] args)
 13         {
 14             string myParentKeyName = "HKEY_LOCAL_MACHINE";
 15             string mySubKeyName = @"SOFTWARE\EricSun\MyTestKey";
 16             string myKeyName = "MyKeyName";
 17 
 18             string value = string.Empty;
 19             value = Utility.Get64BitRegistryKey(myParentKeyName, mySubKeyName, myKeyName);
 20             Console.WriteLine("The Value is: {0}", value);
 21         }
 22     }
 23 
 24     public class Utility
 25     {
 26         #region 32位程序读写64注册表
 27 
 28         static UIntPtr HKEY_CLASSES_ROOT = (UIntPtr)0x80000000;
 29         static UIntPtr HKEY_CURRENT_USER = (UIntPtr)0x80000001;
 30         static UIntPtr HKEY_LOCAL_MACHINE = (UIntPtr)0x80000002;
 31         static UIntPtr HKEY_USERS = (UIntPtr)0x80000003;
 32         static UIntPtr HKEY_CURRENT_CONFIG = (UIntPtr)0x80000005;
 33 
 34         // 关闭64位（文件系统）的操作转向
 35          [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 36         public static extern bool Wow64DisableWow64FsRedirection(ref IntPtr ptr);
 37         // 开启64位（文件系统）的操作转向
 38          [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 39         public static extern bool Wow64RevertWow64FsRedirection(IntPtr ptr);    
 40    
 41         // 获取操作Key值句柄
 42          [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 43         public static extern uint RegOpenKeyEx(UIntPtr hKey, string lpSubKey, uint ulOptions, 
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　int samDesired, out IntPtr phkResult);
 44         //关闭注册表转向（禁用特定项的注册表反射）
 45         [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 46         public static extern long RegDisableReflectionKey(IntPtr hKey);
 47         //使能注册表转向（开启特定项的注册表反射）
 48         [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 49         public static extern long RegEnableReflectionKey(IntPtr hKey);
 50         //获取Key值（即：Key值句柄所标志的Key对象的值）
 51         [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 52         private static extern int RegQueryValueEx(IntPtr hKey, string lpValueName, int lpReserved,
 53                                                   out uint lpType, System.Text.StringBuilder lpData,
 54                                                   ref uint lpcbData);
 55 
 56         private static UIntPtr TransferKeyName(string keyName)
 57         {
 58             switch (keyName)
 59             {
 60                 case "HKEY_CLASSES_ROOT":
 61                     return HKEY_CLASSES_ROOT;
 62                 case "HKEY_CURRENT_USER":
 63                     return HKEY_CURRENT_USER;
 64                 case "HKEY_LOCAL_MACHINE":
 65                     return HKEY_LOCAL_MACHINE;
 66                 case "HKEY_USERS":
 67                     return HKEY_USERS;
 68                 case "HKEY_CURRENT_CONFIG":
 69                     return HKEY_CURRENT_CONFIG;
 70             }
 71 
 72             return HKEY_CLASSES_ROOT;
 73         }
 74 
 75         public static string Get64BitRegistryKey(string parentKeyName, string subKeyName, string keyName)
 76         {
 77             int KEY_QUERY_VALUE = (0x0001);
 78             int KEY_WOW64_64KEY = (0x0100);
 79             int KEY_ALL_WOW64 = (KEY_QUERY_VALUE | KEY_WOW64_64KEY);
 80 
 81             try
 82             {
 83                 //将Windows注册表主键名转化成为不带正负号的整形句柄（与平台是32或者64位有关）
 84                 UIntPtr hKey = TransferKeyName(parentKeyName);
 85 
 86                 //声明将要获取Key值的句柄
 87                 IntPtr pHKey = IntPtr.Zero;
 88 
 89                 //记录读取到的Key值
 90                 StringBuilder result = new StringBuilder("".PadLeft(1024));
 91                 uint resultSize = 1024;
 92                 uint lpType = 0;
 93 
 94                 //关闭文件系统转向 
 95                 IntPtr oldWOW64State = new IntPtr();
 96                 if (Wow64DisableWow64FsRedirection(ref oldWOW64State))
 97                 {
 98                     //获得操作Key值的句柄
 99                     RegOpenKeyEx(hKey, subKeyName, 0, KEY_ALL_WOW64, out pHKey);
100 
101                     //关闭注册表转向（禁止特定项的注册表反射）
102                     RegDisableReflectionKey(pHKey);
103 
104                     //获取访问的Key值
105                     RegQueryValueEx(pHKey, keyName, 0, out lpType, result, ref resultSize);
106 
107                     //打开注册表转向（开启特定项的注册表反射）
108                     RegEnableReflectionKey(pHKey);
109                 }
110 
111                 //打开文件系统转向
112                 Wow64RevertWow64FsRedirection(oldWOW64State);
113 
114                 //返回Key值
115                 return result.ToString().Trim();
116             }
117             catch (Exception ex)
118             {
119                 return null;
120             }
121         }
122 
123         #endregion
124     }
125 }