Keyboard Event

Question

Is there an event that get's fired when the keyboard is invoked. I am creating a barcode scanning app for the pocketPC and would like to give the user the ability to type the value in as well. since my code is triggered by the textchanged event, this won't work without the user clicking an option button or something for each item. I figure if they have the keyboard open, they are manually entering, and would have my code then trigger if they hit the enter key or something. any help would be appreciated thx Duddits