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分類:[.NET 全般]
Windows7 Pro 32ビット
Microsoft C# 2010
次のソースでレジストリにアクセスしているが、
RegQueryInfoKeyは成功し、
ハンドルであるkeyや
サブキーの数ctSubKeysは取得できているが、
肝心なRegEnumKeyExになると
エラー５
アクセスが拒否されました
になる。
回避方法を教えてください。
よろしくお願いします。
using System.Runtime.InteropServices;
[DllImport("advapi32.dll")]
public static extern int RegOpenKeyEx(
UIntPtr hKey,
string subKey,
int ulOptions,
int samDesired,
out UIntPtr hkResult);
[DllImport("advapi32.dll")]
public static extern int RegQueryInfoKey(
UIntPtr hkey,
out StringBuilder lpClass,
ref uint lpcbClass,
IntPtr lpReserved,
out uint lpcSubKeys,
IntPtr lpcbMaxSubKeyLen,
IntPtr lpcbMaxClassLen,
IntPtr lpcValues,
IntPtr lpcbMaxValueNameLen,
IntPtr lpcbMaxValueLen,
IntPtr lpcbSecurityDescriptor,
IntPtr lpftLastWriteTime
);
[DllImport("advapi32.dll")]
extern public static int RegEnumKeyEx(
UIntPtr hkey,
uint index,
StringBuilder lpName,
ref uint lpcbName,
IntPtr reserved,
IntPtr lpClass,
IntPtr lpcbClass,
out long lpftLastWriteTime
);
public enum RegSAM
{
QueryValue = 0x0001,
SetValue = 0x0002,
CreateSubKey = 0x0004,
EnumerateSubKeys = 0x0008,
Notify = 0x0010,
CreateLink = 0x0020,
WOW64_32Key = 0x0200,
WOW64_64Key = 0x0100,
WOW64_Res = 0x0300,
Read = 0x00020019,
Write = 0x00020006,
Execute = 0x00020019,
AllAccess = 0x000f003f
}
public static class RegHive
{
public static UIntPtr HKEY_LOCAL_MACHINE = new UIntPtr(0x80000002u);
public static UIntPtr HKEY_CURRENT_USER = new UIntPtr(0x80000001u);
}
static private void RunTest()
{
const string keyName = @"Software\Microsoft\Windows\CurrentVersion\Explorer";
UIntPtr key;
int status = RegOpenKeyEx(
RegHive.HKEY_CURRENT_USER, //UIntPtr hKey,
keyName, //string subKey,
0, //int ulOptions,
(int)RegSAM.QueryValue, //int samDesired,
out key //out UIntPtr hkResult
);
if (0 != status)
{
Console.WriteLine("RegOpenKeyEx failed");
return;
}
var className = new StringBuilder(1024);
var classNameLength = (uint)className.Capacity;
uint ctSubKeys;
status = RegQueryInfoKey(
key, //UIntPtr hkey,
out className, //out StringBuilder lpClass,
ref classNameLength, //ref uint lpcbClass,
IntPtr.Zero, //IntPtr lpReserved,
out ctSubKeys, //out uint lpcSubKeys,
IntPtr.Zero, //IntPtr lpcbMaxSubKeyLen,
IntPtr.Zero, //IntPtr lpcbMaxClassLen,
IntPtr.Zero, //IntPtr lpcValues,
IntPtr.Zero, //IntPtr lpcbMaxValueNameLen,
IntPtr.Zero, //IntPtr lpcbMaxValueLen,
IntPtr.Zero, //IntPtr lpcbSecurityDescriptor,
IntPtr.Zero //IntPtr lpftLastWriteTime
);
if (0 != status)
{
Console.WriteLine("RegQueryInfoKey failed");
return;
}
long lpftLastWriteTime;
for (uint xSubKey = 0; xSubKey < ctSubKeys; ++xSubKey)
{
var subKeyName = new StringBuilder(1024);
var subKeyNameLength = (uint)subKeyName.Capacity;
int status2 = RegEnumKeyEx(
key, //UIntPtr hkey,
xSubKey, //uint index,
subKeyName, //StringBuilder lpName,
ref subKeyNameLength, //ref uint lpcbName,
IntPtr.Zero, //IntPtr reserved,
IntPtr.Zero, //IntPtr lpClass,
IntPtr.Zero, //IntPtr lpcbClass,
// IntPtr.Zero //out long lpftLastWriteTime
out lpftLastWriteTime
);
if (0 != status2)
{
string errorMessage = new Win32Exception(status2).Message;
Console.WriteLine("RegEnumKeyEx failed:" + errorMessage);
break;
}
}
} // static private void RunTest()
private void button6_Click(object sender, EventArgs e)
{
RunTest();
Console.ReadKey();
}
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