Form and Gadget Callbacks

Note: This chapter looks at the callback in more detail. If you are reading this manual for the first time then you may want to skip this chapter and return to it later.

Before you read this chapter you should have read and understood the Form Concepts chapter, in which we saw that callbacks are user-defined actions which are assigned to a form and its gadgets

They are supplied as text strings and may be any valid PML expression, PML Function or method call, including any form, gadget or user-defined object method.