Ad Hoc Query Designer - Web Application

Hello,

I have created a Web application that has the 'Ad-Hoc Query Designer' item.

When I go to create a new query I don't have the option (or I can't find it) to use any variables.

Like in Analyzer I can run a query and it will ask me the values for the variables I have embedded in the query.

How do I make that work using the 'Ad-Hoc Query Designer'

Also I have problems with the application timing out, what timeout variable needs to be adjusted?

Thanks,

Nick