public delegate bool LineSegmentCB(
	SoCallbackAction action,
	out SoPrimitiveVertex v1,
	out SoPrimitiveVertex v2
)

Public Delegate Function LineSegmentCB ( 
	action As SoCallbackAction,
	<OutAttribute> ByRef v1 As SoPrimitiveVertex,
	<OutAttribute> ByRef v2 As SoPrimitiveVertex
) As Boolean

public delegate bool LineSegmentCB(
	SoCallbackAction^ action, 
	[InAttribute] [OutAttribute] SoPrimitiveVertex% v1, 
	[InAttribute] [OutAttribute] SoPrimitiveVertex% v2
)

type LineSegmentCB = 
    delegate of 
        action : SoCallbackAction * 
        v1 : SoPrimitiveVertex byref * 
        v2 : SoPrimitiveVertex byref -> bool