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This sample application uses APIs that are designed to be secure.'''The application must be signed before it can be run. For more information about code signing''', see the [http://docs.blackberry.com/en/developers/subcategories/?userType=21&category=BlackBerry+Signing+Authority+Tool BlackBerry Signing Authority Tool Administration Guide].
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=== Tilt Demo ===
[http://docs.blackberry.com/en/developers/deliverables/8033/Tilt_sample_app_overview_652847_11.jsp Overview]
The tilt demo sample application demonstrates how to limit the screen orientations that a BlackBerry® device application supports, how to show and hide the keyboard that appears on the screen, and how to implement a custom Field class so that it reacts to changes in the BlackBerry device orientation.
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== Touch ===
[http://docs.blackberry.com/en/developers/deliverables/16179/Touch_sample_app_overview_663486_11.jsp Overview]
The touch sample application demonstrates how to create and display an image that changes in response to customized touch events. If you touch the screen and slide your finger to another location on the screen, the application draws a line to trace the movement. You can click menu items to specify the width and color of the lines and to erase the canvas.
