'Rainbowring' is a decorative application for Windows, entered in the HSP contest 2007. Character code of source codes is Shift-JIS.
This program is written in Hot Soup Processor 3(HSP3). HSP3 is a programming language from Japan that was originally developed in 1994. http://en.wikipedia.org/wiki/Hot_Soup_Processor
This program uses GDI+ module for HSP3, created by sprocket. It makes this program more beautiful. http://sprocket.babyblue.jp/