public static extern bool ApplyDeltaW(long ApplyFlags, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpSourceName, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpDeltaName, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpTargetName);