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Create a new scene onkeyevent

Hello i am trying to create a scene graph screen on key event but i am getting an error. How in theory we could do such a job?
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Roku Guru

Re: Create a new scene onkeyevent

Key event handling is easy to set up in XML by including an onKeyEvent() function in the <script> element. When the XML component or its children have the key focus, the onKeyEvent() function will be called whenever an unhandled key event bubbles up the focus chain to the XML component.
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