实现长度、重量、体积等单位换算。在wince 环境下开发，所用的开发工具是evc。这个代码很好用的，希望大家喜欢，谢谢。-Realization of length, weight, volume and other units conversion. Wince environment in development, the development tools used in the evc. Good use of this code, I hope you like, thank yo