Because the new system use the Infragistics,so I install one.The vision is 2003 volumn 2,it is so old.I remember my first company used this vision too when I just graduated from university three years ago.

I want to learn how to use this software.But its help document can't be opened.Windows told me she couldn't find program to open the HTX file.

I opened its sample code. But I found it wasn't a good way.

So I found the way to open HTX file by using Google.Luckly I found it.

http://social.msdn.microsoft.com/Forums/en-US/devdocs/thread/995c3c22-bc80-4b9e-9fb7-6b7dc6793f67

First open the Microsoft Document Explorer.And search Visual Studio 2008 Combined Help Collection Manager.Click the first record in the Local Help tab,we can open the manager.We can find some Infragistics items.Check it.And reopen the Microsoft Document Explorer,We can find the Infragistics help document appear at the left tree.It's amaze.

OH,Shit.Infragistics should regist its help document when it is installed.It will save my time by doing this.