Options, Text Editor, C/C++, Experimental
By changing these options, you can change the behavior related to IntelliSense and the browsing database when you're programming in C or C++. These features are truly experimental and may be modified or removed from Visual Studio in a future release.
To access this property page, press Ctrl+Q to activate the search box and then type experimental. Search finds the page after the first few letters. You can also get to it by choosing Tools > Options and expanding Text Editor, then C/C++, and then choosing Experimental.
These features are available in a Visual Studio installation.
Note
Your computer might show different names or locations for some of the Visual Studio user interface elements in the following instructions. The Visual Studio edition that you have and the settings that you use determine these elements. See Personalize the Visual Studio IDE.
Enable Predictive IntelliSense
Predictive IntelliSense limits the number of results displayed in the IntelliSense dropdown list so that you see only results that are relevant in the context. For example, if you type int x = and invoke the IntelliSense dropdown, you will see only integers or functions that return integers. Predictive IntelliSense is turned off by default.