CrystalReports Viewer object is not available

I'm creating a local application in C# with Crystal Reports, in the design part is all ok, but when I want to use the tool Crystal Reports Viewer it is not available in the toolbox window, how I can turn it available to use 开发者_Python百科it?

Crystal Reports Viewer is a stand-alone application to let the user see the Crystal Report without having to purchase a license. It is available @

http://www.businessobjects.com/forms/crystalreports/viewer/

This will work if you change your project properties to .NET Framework 4.