Today, I found out that the default setting for the Visult studio 2008 is not enable the line number, in order for easy debuging purpose, I have to turn it on.
To turn on the line number for Visual studio 2008 you need to do 2 things:
To turn on the status bar
tools –> Options –> Environment –> General –> Show Status Bar
To turn on the line number for all language
tools –> Options –> Text Editor –> All Language –> Tick the Line Number check box