public string this[
	Guid ItemID
] { get; }

Public ReadOnly Default Property Item ( _
	ItemID As Guid _
) As String

Dim instance As ClientList
Dim ItemID As Guid
Dim value As String

value = instance(ItemID)

public:
property String^ default[Guid ItemID] {
	String^ get (Guid ItemID);
}

/** @property */
public String get_Item(
	Guid ItemID
)

JScript does not support indexed properties.

function get_item(ItemID);