In Windows 8, you can search anything in the apps. For Example, if you want to search an email which you received from Kristina, then simply, go to: Charms bar –> Search. Select “Mail” and then type Kristina in the “Search” field. Results will be generated by the App.
You can turn on and turn off which Apps should be displayed in Search in Windows 8. Advantage is that, there are many apps which you don’t use for searching often, you can turn them off here. Follow the below given steps:
1) Go to: Charms bar –> Settings –> Change PC Settings –> Search
2) On the right side, under “Use these Apps to Search”, turn each App to on or off as per your requirements. If you turn on an App, then it would be displayed in Search and if you turn it off here, it won’t be displayed in the Search.