用GDI来画磁盘空间图的源代码，主要是能让我们知道怎样用GDI来画一个圆或扇形，以前我们见到的都是用API来画，但是效果不是太好，用GDI画出来的就不一样了，十分的平滑，对搞写图片处理程序的朋友是一个很好的例子。-Use GDI to draw disk space diagram source code, mainly to allow us to know how to use GDI to draw a circle or a fan, before we see is the API used to draw, but the effect is not too good, with painting by GDI not the case, very smooth, engaging writing on the picture of a friend deal with the procedure is a good example.