Helo saf,

Thank you for your email as well. As we responded, we don't provide source code of Astah itself unfortunately.

Although we provide sample programs developed by using Astah API and you can find them and its source code in: Astah Professional Installation folder/api/en/sample
Please refer to Astah API User guide for more details on
- Astah API
- Astah API User Guide

You can also create a Plug-in to achieve what you would like to do with Astah. Astah started Plug-in support since version 6.5. We are planning on publishing the tutorial for how to develop Plug-ins on our website in this month.

Please feel free to contact us through our form or this forum at any time if you have any further questions or have any requests to help with your development.

Cheers,
SJ