VB Forum / COM / March 2005

Hi

I want to introduce an  enumerator onto a secondary interface. The
secondary interface already contains a Count and Item-type property

I'm implementing the secondary interface on a Usercontrol which contains
a grid. The effect of the "For each ... in ..."  would be to cycle
through the grid and the NewEnum will return an object containing the
contents of a grid row.

But I'm unsure how to do this! Do I need to implement an IEnumVB-type
interface on the usercontrol and then delegate to it through the
secondary interface ... or can I do it directly from the secondary
interface's implemented call ... or some other way?

Here's the shell

in the calling proc

Private Sub Main
    Process MyUsercontrol.Object
end sub

Private Sub Process(GridData as IMyInterface)

    Dim oGridRowData as clsGridRowData

    For each oGridRowData in GridData
    ... process grid data
    Next oGridRowData

end Sub

in the usercontrol, MyUsercontrol

Implements IMyInterface

Private Property IMyInterface_NewEnum() as IUnknown

   Dim oGridRowData as clsGridRowData

   'load up oGridRowData with data from current row from grid

   ????? - what goes here

End Property

Thanks

Simon