Is the Combo Box the only Question Type which can be populating via a SQL select statement?

My Challenge:

I have a form where the user selects a Municipality from a combo box (SQL Driven).  The user will make several other selections (Project Type, Cost, Population).

I then would like to populate several hidden fields with data elements based upon the selected municipality.  I suppose this would occur by question Event.

Upon form submission the user will presented with possible funding information based upon information gathered from user selection & located in the hidden fields.

I plan on passing these elements to another Dynamic Form in order to build the funding information.

In order to accomplish this do I need to create additional combo boxes instead of hidden fields?  I really don't need additional combo boxes because no additional user selection will be necessary.  Can Hidden fields be made SQL Driven?

No calculation necessary for my project. I simply need to retrieve 2 additional data elements from the database based upon the user selected municipality (Combo Box). I then want to pass the municipality & 2 additional elements to another Dynamic Form (via a querystring) to display customized results ( I'll spare you the details).

I have read some forum posts where Form Developers are populating additional combo boxes based upon a selection in a combo box. I may try this method and not display the additional combo boxes.

I realize this is a lot to ask of Dynamic Forms, but this tool comes very close to doing what I need it to do. Plan B is building a custom DNN Module.

I am so close to making this work.

I was able to auto populate my additional combo boxes with SQL driven values based upon a selection in the Community Combo box. It looks as if I will be able to hide these combo boxes from anonymous users thus making them SQL driven hidden fields. Still wish Hidden fields could be made SQL Driven.

Now for Problems & Frustrations:

I'm trying to create question events that will display Custom HTML Fields based upon my hidden combo boxes.

I can create the event ok but I am unable to enter an Initiation / Postbaclk Question. The values do not appear in the field because they are generated from a SQL Query which uses a parameter. Also, the field is not available for me to hand enter in a value. Any way to hand enter a value thru SQL Express Manager?

Also Custom HTML Fields do not have names as do other question types, therefore you have do guess (based on sort order) which fields to hide/display.

Finally, If I cannot make the above work, Is it possible to add conditional logic to a system message to display or not display certain text?