在绘图过程中捕获鼠标
....................
\Debug
....................\Example022.
cpp
....................\Example022.
h
....................\Example022.
ncb
....................\Example022.
rc
....................\Example022.
sln
....................\Example022.
vcproj
....................\Example022Doc.
cpp
....................\Example022Doc.
h
....................\Example022View.
cpp
....................\Example022View.
h
....................\MainFrm.
cpp
....................\MainFrm.
h
....................\ReadMe.
txt
....................
\res
....................\...\Example022.
manifest
....................\...\Example022.
rc2
....................\Resource.
h
....................\stdafx.
cpp
....................\stdafx.
h
