ttadv335.layo field how it is generated ?

Hello Guys

I have a development to automatically copy a report to another report in a customized VRCs.
many tools tables are involved in this process:
tttadv330 |* Report
tttadv331 |* Report layouts
tttadv332 |* Report Input Data
tttadv333 |* Report Specials
tttadv334 |* Report Output files
tttadv335 |* Report Layout (text)
and some additional tables
After that I need to modify the information in some layouts. Everything is working fine.
The only problem that I have is with the characters (text, and graphical characters) managed in tttadv335.layo since this field stores binary data .
How is the field tttadv335.layo is generated?
For example: in a layout, I have: Project:
project is a label and it is managed in table tttadv333
but the character colon ":" is managed in table tttadv335
The field tttadv335.layo says: :ÿ
because it is a binary format.
I need to move this colon ":" to another position or insert some characters. But I want to do this with programing , no through the normal functionality to edit the layout.

Regards
Gerard