pinvoke.net: Edit: kernel32.GetCPInfo

@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$
@pinvoke=http://pinvoke.net/$$$.htm

Summary: The GetCPInfoEx API

!!!!C# Signature:
	/// <summary>
	/// Gets information on a named code page.
	/// </summary>
	/// <param name="CodePage">The code page number.</param>
	/// <param name="dwFlags">Reserved.  Must be 0.</param>
	/// <param name="lpCPInfoEx">The CPINFOEX struct to initialize.</param>
	/// <returns><c>true</c> if the operation completed successfully; <c>false</c> otherwise.</returns>
	[DllImport("kernel32.dll", SetLastError = true)]
	private static extern bool GetCPInfoEx([MarshalAs(UnmanagedType.U4)] int CodePage, [MarshalAs(UnmanagedType.U4)] int dwFlags, out CPINFOEX lpCPInfoEx);

!!!!User-Defined Types:
	private const int MAX_DEFAULTCHAR = 2;
	private const int MAX_LEADBYTES = 12;
	private const int MAX_PATH = 260;

[StructLayout(LayoutKind.Sequential)]
	private struct CPINFOEX
	{
		[MarshalAs(UnmanagedType.U4)]
		public int MaxCharSize;

[MarshalAs(UnmanagedType.ByValArray, SizeConst = MAX_DEFAULTCHAR)]
		public byte[] DefaultChar;

[MarshalAs(UnmanagedType.ByValArray, SizeConst = MAX_LEADBYTES)]
		public byte[] LeadBytes;

public char UnicodeDefaultChar;

[MarshalAs(UnmanagedType.U4)]
		public int CodePage;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PATH)]
		public string CodePageName;
	}

!!!!Notes:
None.

!!!!Tips & Tricks:
Please add some!

!!!!Sample Code:

/// <summary>
	/// ACT (reference) code pages.
	/// </summary>
	/// <remarks>
	/// A table of ACT code pages can be found here:
	/// http://msdn.microsoft.com/en-us/library/aa288104.aspx
	/// </remarks>
	private enum ActCodePage
	{
		/// <summary>
		/// Default to ANSI code page
		/// </summary>
		CP_ACP = 0,

/// <summary>
		/// Default to OEM code page
		/// </summary>
		CP_OEMCP = 1,

/// <summary>
		/// Mac?
		/// </summary>
		CP_MACCP = 2,
		
		/// <summary>
		/// Current thread's ANSI code page
		/// </summary>
		CP_THREAD_ACP = 3,
		
		/// <summary>
		/// SYMBOL translations
		/// </summary>
		CP_SYMBO = 42,
		
		/// <summary>
		/// Unicode (UTF-7)
		/// </summary>
		CP_UTF7 = 65000,

/// <summary>
		/// Unicode (UTF-8)
		/// </summary>
		CP_UTF8 = 65001,
	}

/// <summary>
	/// Gets the .NET Encoding object for a given ACT code page.
	/// </summary>
	/// <param name="codePage">The code page 'pointer' to look up.</param>
	/// <returns>The .NET Encoding for the requested code page.</returns>
	private static Encoding GetEncoding(ActCodePage codePage)
	{
		CPINFOEX info = new CPINFOEX();
		if (GetCPInfoEx((int)codePage, 0, out info))
		{
			Regex findNumber = new Regex(@"^\d+", RegexOptions.Compiled);
			Match match = findNumber.Match(info.CodePageName);
			if (match.Success)
			{
				int cp = int.Parse(match.Groups[0].Value);
				return Encoding.GetEncoding(cp);
			}
			else
			{
				throw new ArgumentException("Unable to find codepage number.");
			}
		}
		else
		{
			throw new Win32Exception(Marshal.GetLastWin32Error());
		}
	}

!!!!Alternative Managed API:
Do you know one?  Please contribute it!

Documentation: GetCPInfoEx@msdn on MSDN