软件注册码方面的应用和本地化的加密

加密

using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.Win32;

namespace Wjb.ReadOrWriteIniAndReg
{
/// <summary>
/// HardDiskVal 的摘要说明。
/// 读取指定盘符的硬盘序列号
/// 类库开发：吴剑冰
/// 时间：2003年10月20日
/// 功能：读取指定盘符的硬盘序列号
/// </summary>
public class HardDiskVal
{
[DllImport("kernel32.dll")]
private static extern int GetVolumeInformation(
string lpRootPathName,
string lpVolumeNameBuffer,
int nVolumeNameSize,
ref int lpVolumeSerialNumber,
int lpMaximumComponentLength,
int lpFileSystemFlags,
string lpFileSystemNameBuffer,
int nFileSystemNameSize
);
/// <summary>
/// 获得盘符为drvID的硬盘序列号，缺省为C
/// </summary>
/// <param name="drvID"></param>
/// <returns></returns>
public string HDVal(string drvID)
{
const int MAX_FILENAME_LEN = 256;
int retVal = 0;
int a =0;
int b =0;
string str1 = null;
string str2 = null;

int i = GetVolumeInformation(
drvID + @":\",
str1,
MAX_FILENAME_LEN,
ref retVal,
a,
b,
str2,
MAX_FILENAME_LEN
);

return retVal.ToString();
}
public string HDVal()
{
const int MAX_FILENAME_LEN = 256;
int retVal = 0;
int a =0;
int b =0;
string str1 = null;
string str2 = null;

int i = GetVolumeInformation(
"c:\\",
str1,
MAX_FILENAME_LEN,
ref retVal,
a,
b,
str2,
MAX_FILENAME_LEN
);

return retVal.ToString();
}
}
}