Opening Office files in different modes from ASP.NET

Hello, all!

I have a web application developed with asp.net, vb.net.

My client wants to have this kind of feature:

When the user clicks on the links to Office files (Excel, Word, Visio), the files are opened based on the user profile, in other words, the files are either open in read-only or in full-mode.

I tried several different solutions which I found on the internet but none of them worked properly or required a lot of configuration.

1) I found a client-side vbscript which allows opening office files. It works ok for for simple html pages but in my application it doesn't work giving me Activex component error. http://support.microsoft.com/support/kb/articles/Q178/2/22.ASP

2) Also, I tried using Microsoft.Office.Core library (for example,  
Dim objExcel as New Excel.Application
objExcel.Visible = true
objExcel.Workbooks.Open (location))

to do the same thing but unfortunately as I discovered, it doesn't allow opening the files on the fly. However, it opens the files for Windows-form application.

3) I installed Office Web component 11 and I tried using it to achieve the same goal but I was unlucky again.

So, is there a way to open Office files in different modes from the web application?

I need clear explanation with some code snippet in vb.net or c# or some scripting language.
May be, someone had the same kind of problem.
LVL 1
EugeneTrukhinAsked:
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webwomanCommented:
ANY internet based use of Office programs will be accessed through the IUSR_machine account ON THE WEB SERVER. Unless you set up accounts for all your users AND turn off anonymous access, reguiring them to login, they will ALL be the anonymous user, with NO write access to ANYTHING.

They are NOT using the files on THEIR systems -- they're using them on the WEB SERVER. Huge difference.
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EugeneTrukhinAuthor Commented:
Clarification:

well,  the users need to login, so there are no anonymous users, right now users can click on the links which open the office files in a new window, and they are able to change the content and store it on the web server. Yes, the links are to the files on the web server.

is it clear?
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webwomanCommented:
Then you need to set the permissions on the web server, on the file directly. It still might not work, but it's the only thing that's even got a chance.
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