I've written a program which "read data" from the school server. There is a webbrowser control in the program, which read a HTML page from the server, and the VB will find the information from the HTML document. I used

Code:
instr(WebBrowser1.DocumentText, information)
This works fine on my computer, which is:
- Vista x64
- built in IE7
- VS 2008 (with .Net Framework 3.5)

However, the program doesn't work on my friend's computer, which is a XP machine. The program can be run, but the function doesn't work. There IS such a string within the same HTML document, but no reaction triggered by the "instr" statement. Is it the problem that ".documenttext" works only on IE7, but not IE6?

Another problem is that, is it all program written by VS2008 (.Net Framework 3.5) cannot be run on .Net Framework 2.x installed machine?

Thanks for answering my questions!!