Event handler: An event handler is a module is implemented in python program that executes automatically when a particular event has occurred. If user need a program to execute an operation at that time a particular event occurs, user must create an event handler that reply at that time of event takes place. Event can be pressing the key or mouse operation by the user. To deal this type of operation is considered as event handlers. If the defined event occurs, then call the handler function with help of object of event. The following format is a general format for event handler. Module ComponentName_EventName() Statement End Module Where, ComponentName indicates the component name. EventName indicates event name which occurred.

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Chapter 15.4, Problem 15.20CP

Program Plan Intro

Event handler:

An event handler is a module is implemented in python program that executes automatically when a particular event has occurred.

If user need a program to execute an operation at that time a particular event occurs, user must create an event handler that reply at that time of event takes place.

Event can be pressing the key or mouse operation by the user. To deal this type of operation is considered as event handlers.

If the defined event occurs, then call the handler function with help of object of event.

The following format is a general format for event handler.

Module ComponentName_EventName()

Statement

End Module

Where,

ComponentName indicates the component name.

EventName indicates event name which occurred.

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