public static extern bool CreateDeltaW(long FileTypeSet, long SetFlags, long ResetFlags, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpSourceName, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpTargetName, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpSourceOptionsName, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpTargetOptionsName, DELTA_INPUT GlobalOptions, [InAttribute()] System.IntPtr lpTargetFileTime, uint HashAlgId, [InAttribute()] [MarshalAsAttribute(UnmanagedType.LPWStr)] string lpDeltaName);