Normally the standard DNN iframe is used to describe the call of the webpage, urlparameters and there corresponding DNN values (presented by the DNN tokens)
Sometimes you have to cope with the situation that you have to call webpages with url parameters and values which are only available in the database of the webpage to be called and not in the Dotnetnuke environment.
When you can map parameters of Dotnetnuke (like dnn userid) to parameters of the app domain (like idClient) during design time and transfer matching values to the appdomain (eg with databases sync tools) it will be possible to use in the iframe setup urlparameters which are used in the appdomain and there corresponding values if the are retrieved before the webpage is actually