Whats new in the latest Tally Developer and whats new in TDL ?

In this release there are enhancements in User Defined Functions, Collections and Actions.
This document describes in detail the changes to Actions-Print, Upload, Export, Mail. It is now possible to program the configurations for these Actions. This breakthrough capability has enabled us to deliver the mass mailing [...]

Tally Definition Language

Tally Definition Language is the application development language of Tally. TDL is developed to provide the user with flexibility and power to extend the default capabilities of Tally and integrate them with the external applications. TDL provides a development platform for the user. The entire User Interface of Tally.ERP 9 is built using TDL. TDL as a language, [...]

What is TDL ?

Tally Definition Language (TDL) is the development of Tally.ERP 9. This allows the programmers to
develop and deploy faster, effective Tally Extensions with ease.
The book, Extending Tally.ERP 9 Using TDL, begins with the Introduction to TDL and focuses on
basic concepts of TDL ie TDL Components, Symbols used in TDL, Dimensions and Formatting,
Usage of Variables, Buttons and [...]