I would recommend you the Quick Tour chapter as starting point. The section 7. Integrate the GUI component within the application demonstrates the usage of slot methods also in conjunction with the Simple Touch handler. It also shows an application case of PresentDialog().
For more details take a look at the chapter Simple Touch Handler itself. Especially see the section Implement Touch Handler slot methods. It contains an example how to implement code which is activated when the user touches within the area of a touch handler. Also see the chapter Slot Method for more details how to create slot methods.
If you are looking for documentation about Chora coding, it is also found in our Knowledge Base. See the chapter Programming language Chora and its subordinated chapters. It is the Chora reference. For learning I would also recommend the chapter Working with Embedded Wizard and its subordinated chapters.
I hope it helps you further.
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