Dim driverPathCollection1 As DriverPathCollection

Dim key As String
Dim returnValue As DriverPath
returnValue = driverPathCollection1.Item(key)

Public Overridable ReadOnly Property Item( _
		ByVal folderPath As String _
) As DriverPath

public virtual DriverPath this[
		string folderPath
] {get;}

public:
property virtual DriverPath^ default[String^] {
		DriverPath^ get(String^ folderPath);
}

public DriverPath get_Item(
		System.String folderPath
);

In JScript, you can use Indexed Properties defined by a class, but you cannot define your own.