/// <summary>
/// ExtractKeyComponents
/// </summary>
/// <param name="key"></param>
/// <param name="root"></param>
/// <param name="subkey"></param>
private static void ExtractKeyComponents(string key, out IntPtr root, out string subkey)
{
int firstBack = key.IndexOf(@"\");
if (firstBack < 1)
{
throw (new ArgumentException("key"));
}
subkey = key.Substring(firstBack + 1);
string rootName = key.Substring(0, firstBack);
root = RootKey.FromString(rootName);
}