识别常数的简单四则运算, 其中包含有很多VB编程的小技巧！~！VB初学者可以载来看看！~很有帮助的`！-constant recognition of a simple four operations, which includes many small VB programming skills! ~! VB beginners can be set to look at! Helpful `~!

边缘的检测与提取，从一幅图象中将边缘提取出来供识别或处理使用-edge detection and extraction, from the edge of an image will be extracted for use or disposal Recognition