pinvoke.net: Edit: kernel32.GetUserPreferredUILanguages

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Summary: Retrieves information about the user preferred UI languages.

!!!!C# Signature:
 [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
 static extern bool GetUserPreferredUILanguages(
   uint dwFlags,
   out uint pulNumLanguages,
   char[] pwszLanguagesBuffer,
   ref uint pcchLanguagesBuffer);

!!!!VB Signature:

!!!!User-Defined Types:
None.

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

!!!!Notes:
None.

!!!!Tips & Tricks:
The char[] is used because String''''''Builder would otherwise stop at the first \0 character, resulting in only one language ever being reported.

!!!!Sample Code:
 static void DisplayUserPref()
 {
	uint languagesCount, languagesBufferSize = 0;

if (GetUserPreferredUILanguages(
		MUI_LANGUAGE_NAME,
		out languagesCount,
		null,
		ref languagesBufferSize))
	{
		char[] languagesBuffer = new char[languagesBufferSize];
		if (GetUserPreferredUILanguages(
			MUI_LANGUAGE_NAME,
			out languagesCount,
			languagesBuffer,
			ref languagesBufferSize))
		{
			string[] languages = new string(languagesBuffer, 0, (int) languagesBufferSize - 2).Split('\0');
			Console.WriteLine("GetUserPreferredUILanguages returns " + languages.Length + " languages:");
			foreach (string language in languages)
				Console.WriteLine("   " + language);
		}
		else
			Console.WriteLine("GetUserPreferredUILanguages(2) returns #" + Marshal.GetLastWin32Error());
	}
	else
		Console.WriteLine("GetUserPreferredUILanguages(1) returns #" + Marshal.GetLastWin32Error());
 }

const uint MUI_LANGUAGE_ID = 0x4;	// Use traditional language ID convention
 const uint MUI_LANGUAGE_NAME = 0x8;	// Use ISO language (culture) name convention

Documentation: GetUserPreferredUILanguages@msdn on MSDN