Signing BlackBerry application

Hi all I'm new in Blackberry d开发者_运维问答evelopment I wanted to know is it necessary to sign all application after development?? If yes then How to sign the application??

Please Help me

Thank you

Abhishek

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In case you do not use signed api (signed api classes are marked in api documentation) it is not necessary, but if you use it, you have to sign the application to launch it on an actual device.

Signing keys can be obtained from Research In Motion company's web-site.