VBA - Class Module - access to property by index - excel

Question

is there way how to make class working similar to Arrays?
Let's say, I have Class (e.g. Workers) where main property is array of the Workers, nothing else.
Then I'm filling the class as follows
Dim wks as new Workers
wks.add("Worker1")
wks.add("Worker2")
wks.add("Worker3")
Then in Workers Class module:
Private Workers as Variant
Public Function add(ByVal val As Variant) As Long
ReDim Preserve Workers(LBound(Workers) To UBound(Workers) + 1)
Workers(UBound(Workers)) = val
add = UBound(Workers) - LBound(Workers) +1
End Function
Workers representation -> {"Worker1", "Worker2", "Worker3"}
Then I want to access Worker by its index. I know, how to access it by e.g wks.getWorker(1) but what I want to do, is to access it directly by wks(1) which should return "Worker 1". Example above looks, that usual Array or Collection can be used, but I have many internal methods done, only what I'm missing is to access Workers property to read/write directly by its index number.
Is it possible?
Edit
After transfer to Collections, Class looks like:
Option Explicit
Private Workers As Collection
Private Sub Class_Initialize()
Set Workers = New Collection
End Sub
Public Function add(ByVal val As Variant) As Long
Workers.add val
End Function
Public Property Get Item(Index As Integer) As Variant
Item = Workers(Index)
End Property
Public Property Set Item(Index As Integer, Value As Variant)
Workers.Remove Index
Workers.add Value, Before:=Index
End Property
with hidden attributes Attribute Item.VB_UserMemId = 0 at Getter and Setter.
Getting works fine:
Dim wks As New Workers
wks.add "Worker1"
wks.add "Worker2"
wks.add "Worker3"
Debug.Print wks(2) ' <-- OK here
'wks(2) = "Second Worker" ' <-- By debugging this go to Getter not Setter and after Getter is done, it allerts with Runtime error '424': Object required
Set wks(2) = "Second Worker" ' <-- This alert immediately Compile error: Object required on "Second Worker" string
Debug.Print wks(2)
Prints "Worker2" into console, thanks for this, but still I'm not able to set a new value to the required Index of the Workers Collection.

Answer 1

You could use a default member in VBA. Though you can't make the default memeber directly through VBA editor, but you can use any text editor.
Export your class from VBA editor, i.e. File->Export File
Open your exported class in Notepad (or any text editor)
Add this attribute line on your method or property you want to make it default. Attribute Item.VB_UserMemId = 0
You can for example make getWorker default member as.
Public Function GetWorker(Index As Integer) As Worker
Attribute Item.VB_UserMemId = 0
GetWorker = Workers(Index)
End Function
you can then use it like.
Set wk = wks(1)
Here is some detail about default members
http://www.cpearson.com/excel/DefaultMember.aspx
Edits
An example to make Getter/Setter as default member
Public Property Get Item(Index as Integer) as Worker
Attribute Item.VB_UserMemId = 0
Set Item = Workers(Index)
End Property
Public Property Set Item(Index as Integer, Value as Worker)
Attribute Item.VB_UserMemId = 0
Set Workers(Index) = Value
End Property