外接矩形的绘制和填充
....................\test
....................\....\007.jpg
....................\....\7.jpg
....................\....\8.jpg
....................\....\Debug
....................\....\.....\test.bsc
....................\....\.....\test.exe
....................\....\.....\test.ilk
....................\....\.....\test.obj
....................\....\.....\test.pch
....................\....\.....\test.pdb
....................\....\.....\test.sbr
....................\....\.....\vc60.idb
....................\....\.....\vc60.pdb
....................\....\test.cpp
....................\....\test.dsp
....................\....\test.dsw
....................\....\test.ncb
....................\....\test.opt
....................\....\test.plg