To change the project toolset
In Visual Studio, in Solution Explorer, open the shortcut menu for your project (not for your solution) and then choose Properties to open your project Property Pages dialog box.
In the Property Pages dialog box, open the Configuration drop-down list and then select All Configurations.
In the left pane of the dialog box, expand Configuration Properties and then select General.
In the right pane, select Platform Toolset and then select the toolset you want from the drop-down list. For example, if you have installed the Visual Studio 2010 toolset, select Visual Studio 2010 (v100) to use it for your project.
Choose the OK button.
