Where is the PageMouseEventArgs class

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C#3.0

C#

CrystalReports

I am using c# in VS2008 professional edition. In my windows application i have crystal reports. When i click on a field in crystalreport i want to get the value of that field. I searched net and found that using the following code i can implement it.

Event fires when a report object has been double clicked in the viewer.

Namespace CrystalDecisions.Windows.Forms Namespace

Assembly CrystalDecisions.Windows.Forms (CrystalDecisions.Windows.Forms.dll)

public event CrystalDecisions.Windows.Forms.PageMouseEventHandler DoubleClickPage 

private void crystalReportViewer_DoubleClickPage(object sender, PageMouseEventArgs e)
{
 MessageBox.Show(e.ObjectInfo.ObjectType.toString());
}

I tried to find the above event and PageMouseEventArgs class but nothing found.
Is this available in VS2008??? If yes how??? If it not why???
Any one have an idea????