Rendering button event on parts of the screen?

Hi I am new to Blackberry.I have a Bitmap which is used as a homescreen and it contains four stages.I want to make these stages 开发者_运维问答as Buttons.I am developing the application in storm version.How can I implement these parts of the screen as Button events?Any answers appreciate.

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Take a look at the BitmapButton example

Implement advanced buttons, fields, and managers
Started 04-21-2010
Modified 05-10-2010
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