WP7 has a several built in launchers, but the map app does not have one. Itâ€™s unfortunate because I think itâ€™s fairly common that youâ€™d want to have a link to get directions in a mobile app since you are, you know, mobile. Right now the best way to do that is to basically recreate the map app inside your app using Bing/Google maps to get turn by turn directions and the SL Bing maps control.
That sort of approximates the behavior of the map launcher in the native apps like IE. The downside to this is that it requires 2 back button presses to get back to your app. It also inserts that page into the IE app history. Itâ€™s not ideal, but neither is trying to recreate the map app inside your own map app. I wouldnâ€™t really recommend this approach, but itâ€™s there if you really need it.
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