Earlier this week I wrote about how to calculate the distance between two points in a location-aware app.
在winrt中 多点触控 控件的应用越来越多，例如 各种手势与 控件之间的互动，如常规的：放大缩小，滑动，旋转，轻扫等。。
By John Tyrrell
Perhaps, readers remember my article titled "Last line effect". It describes a pattern I've once noticed: in most cases programmers make an error in the last line of similar text blocks.