How to visualise a logic flow

[andymm]

Hi Forum - I am new to Visio and would appreciate some guidance :-)
I have a project to document the logic in some existing software (basically a digital questionnaire).  That is to say there are option points throughout the questionnaire, filters to change what is seen based on previous choices at option points and goto's based on selected options.

What I need to do is produce a visual representation of the logic flow.  I have been trying to use standard templates in Viso but am not really sure which one would give me the required shapes to handle the logic and building the links by hand would be very time consuming because there are multiple questionnaires.  I wondered if it was possible to reverse engineer the data that currently exists and automatically populate a flow chart?

If anyone has any pointers about how best to approach this problem I would be very grateful.

[JuneTheSecond]

There are 3 shapesheet functions for logical calculation in Visio, and , or, not.
They might be basically useful.

I have drawings and shapes for a kind of  logical calculation flowchart,
though they are different types from what you are looking for.

At
http://june2.carrots.jp/english/calexapl2.htm
or
http://june2.carrots.jp/english/flipflop.htm