public static extern bool FindNextFileW([System.Runtime.InteropServices.InAttribute()] System.IntPtr hFindFile, out WIN32_FIND_DATAW lpFindFileData);
public static extern System.IntPtr FindFirstFileW([System.Runtime.InteropServices.InAttribute(), System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPWStr)] string lpFileName, out WIN32_FIND_DATAW lpFindFileData);