Simple Database Project With AppBasic - TextAreas

I have an idea for creating a database using AppBasic based on the following:

http://homepages.nildram.co.uk/~riscos/problems/idea.zip

Requirements

• Database to be text based for easy editing – see below.
• Easy editing of text in action button gadget – simply done in ResEd.
• Large text file.

I envisage the information text organised like this…

Information text here
end-of-text
|
|
Mnemonic (eg. INKEY)
space here
Information text here
end-of-text

and so on.

How do I go about creating code that identifies the related area of text when a specific action button is clicked and stores it into a memory buffer?

It’s quite possible something similar has been done before but as a project it would be interesting for me to try and do this in AppBasic.