plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BWinForm%2BForm%E5%86%85%E4%BB%96%E3%81%AEexe%E3%82%92%E5%AE%9F%E8%A1%8C%E3%81%99%E3%82%8B
plugin=diff is not implemented.