Dim runOnceCommandCollection1 As RunOnceCommandCollection

Dim key As Integer
Dim returnValue As RunOnceCommand
returnValue = runOnceCommandCollection1.Item(key)

Public Overridable ReadOnly Property Item( _
		ByVal order As Integer _
) As RunOnceCommand

public virtual RunOnceCommand this[
		int order
] {get;}

public:
property virtual RunOnceCommand^ default[int] {
		RunOnceCommand^ get(int order);
}

public RunOnceCommand get_Item(
		int order
);

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