public delegate int DelegateParameterBacktrack(
	PlTerm term1,
	PlTerm term2,
	IntPtr control
)

Public Delegate Function DelegateParameterBacktrack ( 
	term1 As PlTerm,
	term2 As PlTerm,
	control As IntPtr
) As Integer

public delegate int DelegateParameterBacktrack(
	PlTerm term1, 
	PlTerm term2, 
	IntPtr control
)

type DelegateParameterBacktrack = 
    delegate of 
        term1 : PlTerm * 
        term2 : PlTerm * 
        control : IntPtr -> int