UFT Pro (LeanFT) .NET SDK Reference, Version 14.03
UiObjectDescription Constructor
Example 
Syntax
public UiObjectDescription()
Example
// Create a description for the AUT DesktopPane as an IUiObject. 
// Set the NativeClass value for the Description object. 
var desktopPane = window.Describe<IUiObject>(new UiObjectDescription
{
    NativeClass = "javax.swing.JDesktopPane"
});