public abstract MatExpr this[
	int pos
] { get; set; }

Public MustOverride Default Property Item ( 
	pos As Integer
) As MatExpr
	Get
	Set

public:
virtual property MatExpr^ default[int pos] {
	MatExpr^ get (int pos) abstract;
	void set (int pos, MatExpr^ value) abstract;
}

abstract Item : MatExpr with get, set