Windowsフォルダアイコンの変更

using System;
using System.Runtime.InteropServices;

public class SetFolderIcon
{
	[DllImport("kernel32.dll")]
		private static extern bool WritePrivateProfileString(
			string lpAppName, string lpKeyName
			, string lpString, string lpFileName);
	[DllImport("shlwapi.dll")]
		private static extern bool PathMakeSystemFolder(
			string folderName);

	private SetFolderIcon()
	{
	}

	public static void SetIcon(string targetFolder, string iconFilePath, int iconIndex) 
	{
		string desktopIni = System.IO.Path.Combine(targetFolder, "Desktop.ini");
		WritePrivateProfileString(".ShellClassInfo", "IconFile", iconFilePath, desktopIni);
		WritePrivateProfileString(".ShellClassInfo", "IconIndex", iconIndex.ToString(), desktopIni);
		System.IO.FileInfo finfo = new System.IO.FileInfo(desktopIni);
		finfo.Attributes |= System.IO.FileAttributes.Hidden;
		PathMakeSystemFolder(targetFolder);
	}
}