Question

In C++ it is possible to pass a temporary object argument to a function:

struct Foo
{
    Foo(int arg);
    // ...
}

void PrintFoo(const Foo& f);

PrintFoo(Foo(10))

I am trying to implement something similar in Visual Basic 6:

'# Scroll bar params
Public Type ScrollParams
    sbPos As Long
    sbMin As Long
    sbMax As Long
End Type

Public Function MakeScrollParams(pos As Long, min As Long, max As Long)
    Dim params As ScrollParams
    With params
        .sbPos = pos
        .sbMin = min
        .sbMax = max
    End With
    Set MakeScrollParams = params
End Function

'# Set Scroll bar parameters
Public Sub SetScrollParams(sbType As Long, sbParams As ScrollParams)
    Dim hWnd As Long
    ' ...

End Sub

However, Call SetScrollParams(sbHorizontal, MakeScrollParams(3, 0, 10)) raises an error: ByRef argument type mismatch. Why?

Answer 1

Maybe?

Public Function MakeScrollParams(pos As Long, min As Long, max As Long) As ScrollParams