C#

int number = 1001;

switch(number)
{
 case 0:
     return "zero";
 case 1:
     return "one";
 //etc...
 case 1001:
     return "one thousand and one";
 //do this until about a million - that should be more than enough
}

class Program
{
  [DllImport("advapi32", CharSet = CharSet.Auto, SetLastError = true)]
  static extern bool ConvertSidToStringSid([MarshalAs(UnmanagedType.LPArray)] byte[] pSID, out IntPtr ptrSid);

  [DllImport("kernel32.dll", SetLastError = true)]
  static extern IntPtr LocalFree(IntPtr hMem);

  static void Main(string[] args)
  {
    System.Security.Principal.WindowsIdentity id = System.Security.Principal.WindowsIdentity.GetCurrent();

    byte[] sidBytes = new byte[id.User.BinaryLength];
    id.User.AccountDomainSid.GetBinaryForm(sidBytes, 0);

    string sidManaged = id.User.AccountDomainSid.ToString();
    Trace.Write(sidManaged);

    string sidUnmanaged = GetSidString(sidBytes);
    Trace.Write(sidUnmanaged);
  }

  public static string GetSidString(byte[] sid)
  {
    IntPtr ptrSid;
    string sidString;
    if (!ConvertSidToStringSid(sid, out ptrSid))
      throw new System.ComponentModel.Win32Exception();
    try
    {
      sidString = Marshal.PtrToStringAuto(ptrSid);
    }
    finally
    {
      LocalFree(ptrSid);
    }
    return sidString;
  }
}

SimpleData wrote:

without using SlimDX (and other external libraries needed to be installed). But an external DLL is OK.

SimpleData wrote:

How can I directly read from DX's buffer?