public delegate bool PointCB(
	SoCallbackAction action,
	out SoPrimitiveVertex v1
)

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

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

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