Execute Prerequisite condition only if Internet connection is available

[megha_3781]

I need to include .Net 3.5 framework pre-requisite for Windows 8 /8.1.
But in some machines if internet connection is not there the setup will go on and on and after 10-15 mins it gives error whose
error code means No active internet connection,

Is there any way to check in the above Pre-requisite if internet connection is available prior to launch pre-requsite.

So that I can show a message to user "Need to have internet connection"

[Roman1]

As condition of prereq. you can check a registry value.
Write an small app which checks Internet Connection and writes result temporär in reg.
Start this app as very first prereq.
The install conditions for .net supplement of checking for the new temp reg value.

[megha_3781]

Thanks. Is there any other way to get return values from other pre-requisites instead of updating in registry?