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vb6 - Variable number of arguments in VB

How to create a function with variable number of arguments in visual basic? ex.

x =  Sum(1,2,3)
y =  Sum(1,2)

Function Sum('how to declare argument here')
'Is there any special argument manipulation inside function before it is usable?
End Function
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Have a look at Passing a Variable Number of Arguments

Function Sum(ParamArray Vals() As Variant)
    Dim intLoopIndex As Integer
    For intLoopIndex = 0 To  UBound(Vals)

    Next intLoopIndex

End Function

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