Using an Insure configuration for large projects enables you to switch back and forth between instrumented and non-instrumented versions of your program without recompiling all of your source files.  

1. Choose Configuration Manager from the Build menu.
2. Choose <New> in the Active Solution Configuration window.
3. Type Insure in the New Solutions Configuration> Solution Configuration Name window.
4. Specify the appropriate configuration in the Copy Settings From: window and click OK.
5. In the Project Contexts window, choose the appropriate settings for Project, Configuration, and Platform. 
6. Click Close. 

After you complete these procedures, you will be able to switch back and forth between “Debug" and "Insure" configurations without rebuilding your projects.