Adjusts a Sub procedure to be a Function procedure, and updates all usages.


Each example is a self-contained MCVE showing the feature in a single specific scenario.

Standard Module
Named Module1 by default, these are general-purpose standard procedural modules.
Class Module
Named Class1 by default, these modules define the default interface for an object of that type.
Predeclared Class
A class module with its VB_PredeclaredId attribute set to True (with or without a @PredeclaredId annotation).
Interface Module
Abstract interfaces are class modules (with or without an @Interface annotation) whose default interface is not a class type intended to be instantiated.
UserForm Module
A predeclared class with a design-time visual designer using the MSForms UI framework.
Document Module
Owned by the host application, these class modules belong to the host document and may handle various events fired by the host application.

Module1 (before)

Public Sub DoSomething()
    Dim value As Long
    GetValue value
    Debug.Print value
End Sub
Private Sub GetValue(ByRef value As Long)
    value = 42
End Sub

Module1 (after)

Public Sub DoSomething()
    Dim value As Long
    value = GetValue(value)
    Debug.Print value
End Sub
Private Function GetValue(ByVal value As Long) As Long
    value = 42
    GetValue = value
End Function

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