public void Extent(
	ref double min_x,
	ref double min_y,
	ref double max_x,
	ref double max_y
)

Public Sub Extent ( 
	ByRef min_x As Double,
	ByRef min_y As Double,
	ByRef max_x As Double,
	ByRef max_y As Double
)

public:
void Extent(
	double% min_x, 
	double% min_y, 
	double% max_x, 
	double% max_y
)

member Extent : 
        min_x : float byref * 
        min_y : float byref * 
        max_x : float byref * 
        max_y : float byref -> unit