[AccessD] Iterator functionality

It has been awhile since I screwed up an email thread this big.

;)

John W. Colby

Reality is what refuses to go away
when you do not believe in it

On 10/2/2013 1:13 PM, Gustav Brock wrote:
> Hi John
>
> I've never heard of IUnknown in relation to VBA.
> Thanks!
>
> /gustav
>
>
>>>> jwcolby at gmail.com 02-10-13 18:23 >>>
> I learned something new the other day. You can place a hidden method in a class (export to file, make the change, import back in to the FE) which creates a single iterator for a single collection.
>
> '
>
> '*******************************************************************************
>
> 'Code for collection iterator
>
> 'Export to a text file and examine for special properties
>
> 'vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>
> '
>
> Public Sub Add(ByVal cOpenArg As clsOpenArg, Optional ByVal key As Variant)
>
>       If IsMissing(key) Then
>
>           mcolOpenArg cTDFConn
>
>       Else
>
>           mcolOpenArg cTDFConn, key
>
>       End If
>
> End Sub
>
> Public Function Count() As Long
>
>       Count = mcolTDFConn.Count
>
> End Function
>
> Public Function Item(ByVal Index As Variant) As clsOpenArg
>
>       Set Item = mcolTDFConn(Index)
>
> End Function
>
> Public Sub Remove(ByVal Index As Variant)
>
>       mcolTDFConn.Remove Index
>
> End Sub
>
> Public Function NewEnum() As IUnknown
>
>       Set NewEnum = mcolTDFConn.[_NewEnum]
>
> End Function
>
> '
>
> '^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> 'Code for collection iterator
>
> 'Export to a text file and examine for special properties
>
> '*******************************************************************************
>
> '
>
>
> Suddenly you can do things like
>
> dim cOpenArg as clsOpenArg
>
>       for each cOpenArg in cOpenArgs
>       next cOpenArg
>
> It is the NewEnum function which allows the class to do this.
>
> Obviously you have to modify this code to deal with whatever is in your collection.
>
>
> John W. Colby
>
> Reality is what refuses to go away
> when you do not believe in it
>