XP idea出品的免费OCR软件，这是其开发文档。-A free OCR software product by XP idea,here is the SDK document.

LiteCAD是一款建议的CAD软件，提供二次开发SDK，LiteCAD.dll为CAD控件，用户可以快速的定制自己的CAD软件界面，开发文档详细，可以自定义命令以及事件响应函数，支持语言配置(LiteCAD CAD is a software that provides two times, the development of SDK, LiteCAD.dll for the CAD control, the user can quickly customize CAD software d