Try this :
http://lmgtfy.com/[
^]
By the way :
- When you asking a question, tell us exactly what you DID because we cannot read your mind nor your hard disk
- And, you must tell us what you TRIED, you must try and do something, not just throw a question and wait for help
- Windows Phone App or Desktop App or whatever, you must practice your debug skill and problem solving skill
- Finally, before asking any question, read your question again, and think about when somebody (not you) read that, can they understand it ?
Try harder bro, good luck and hope you the best !!! (sorry about my bad English)