How can you add a querystring parameter to the url and not have the FriendlyURL function change it?

Thanks.   Seems you can put a : or / and it leaves it alone. 

So even though it is friendly it is still part of request.querystring (I should break my asp habit probably.).    I can't seem to access it that way even thought it is part of the friendly url /tabid/122/test/abc     Example, in code I added &test=abc

eta:  oh it is in the collection..  I must have had something wrong before.    Why is it that the url is not converted to friendly on a straight submit in the address bar?  But if code redirects it or processes it the url does become friendly.

You can use a "normal" url with querystring variables if you want.  
The only thing that changes it in the output is when you use the DNN NavigateUrl() function which formats it as "friendly" for output.

You can even add more querystring variables to a "friendly" url. Just make sure you don't put the same variable in there twice or you will get the multiple values concatenated with a comma in that item. 

The Rewriting a url only acts on the input. Depending on your implementation, at the beginning of the request it will breakup the Url into normal querystring parameters and then rewrite it on the context of the request so that when the events start happening in the Page Lifecycle it will look "normal" again.

The DNN UrlRewriter is a little more complicated because it is mixed in with other things that happen on the beginning of the request like looking up the correct portal, and now doing logic for SSL and the new Human friendly tab Lokup from the tabPath.  The DNN UrlRewriter will also do a redirect (unfortunately a 302 instead of a 301) instead of a rewrite if you have a rule that includes the host.domain name.  It does this so that it can start over in the other processing.