1) The wireless printer that you will use usually provides SDKs or drivers along with their printers. Thus, it is basically very easy to integrate into your application. In my case, I used: http://www.starmicronics.com/printer/home.aspx
2) To print your handouts, you either need to convert your slides into bitmaps, or the byte again depends on the SDK requirements, for example, in what format they need information. So at this point you will convert your views / layouts into bitmaps.
This is the way I did, and depends on the specific requirements of the printer. So, first understand what your requirement is.
There are also printers that support bluetooth profiles. Let me know if you need more information.
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