With Beas script you can modify and extend Beas and SAP Business One in various ways.
No other tools, cancellation or restart of the program is necessary.
Beas was developed in this script language. The source code is available.
A documentation is available: Beasscript
The main advantages of Beas script are the versatility and the direct access to different frameworks and Api's:
SAP Business One - Data-Api and User-Interface-Api
Beas - Data-Api and User-Interface-Api