How to hide strings in a exe or a dll?

Question

I discovered that it is possible to extract the hard-coded strings from a binary.
For example the properties view of Process Explorer displays all the string with more t

Answer 1

There are URLs for http requests that I would like to hide too.

If your app is making the request, there is no point hiding this. Running an app like fiddler, http analyzer, or one of dozens of other free and readily available methods will show all the traffic your app is creating.