Coding for a Windows Phone 8 App

Two very simple tasks: 1) On mainpage is a checkbox. On checkstate = checked the app needs to save a setting not to show mainpage again, instead navigating to another internal page instead; 2) User should be able to save settings for a username and password for website which they can enter into textboxes. These then fill in the fields for a particular site in a headless browser, taking the user to the logged in page once logged in