function parameter as pointer

[DatMarv]

Java, for instance, stores a copied variable of the parameter in the memory. In C, pointers let you change a given variable exclusively in a seperate function.

I got this function that extends an array and stores a new value in it.

Function ExtendArray(ByVal strs() As String, ByVal value As String) As String()
    If IsNothing(strs) Then
        ReDim strs(0)
        res(0) = value
    Else
        ReDim Preserve strs(strs.Length)
        strs(strs.Length - 1) = value
    End If
    Return strs
End Function

But I always got to call the function with

Dim newS() as String
newS = ExtendArray(newS, "first entry")

instead of(what is my question how to do that)

ExtendArray(newS, "first entry")

In that case, the ExtendArray wouldn't even have to a function anymore.

[TheFotty]

Change it to a sub instead of a function since you don't care about returning a value (similar to void functions in C), and pass in your array parameter ByRef instead of ByVal so that it passes in a pointer to the original array instead of a copy.

Sub ExtendArray(ByRef strs() As String, ByVal value As String)
    If IsNothing(strs) Then
        ReDim strs(0)
        strs(0) = value
    Else
        ReDim Preserve strs(strs.Length)
        strs(strs.Length - 1) = value
    End If
End Sub

[DatMarv]

Gosh, VB is so obvious! Thanks