A Popup Progress Window
http://www.codeproject.com/KB/miscctrl/progresswnd.aspx
Showing progress bar in a status bar pane
http://www.codeproject.com/KB/miscctrl/progressbar.aspx
VC技巧：在程序的状态栏中实现进度条
http://csed.nciae.edu.cn/bianchengjiqiao/vc.htm
