property OleEvent.Param (Item as Variant) as OleEventParam

Retrieves an OleEventParam object given either the index of the parameter, or its name.

TypeDescription
Item as Variant A long expression that indicates the argument's index or a string expression that indicates the argument's name. 
OleEventParam An OleEventParam object that contains the name and the value for the argument.

The following sample shows how to enumerate the arguments of an OLE event:

Private Sub ExplorerTree1_ItemOleEvent(ByVal Group As EXPLORERTREELibCtl.IGroup, ByVal Item As EXPLORERTREELibCtl.HITEM, ByVal Ev As EXPLORERTREELibCtl.IOleEvent)
    On Error Resume Next
    Debug.Print "Event name:" & Ev.Name
   If (Ev.CountParam = 0) Then
      Debug.Print "The event has no arguments."
   Else
      Debug.Print "The event has the following arguments:"
      Dim i As Long
      For i = 0 To Ev.CountParam - 1
         Debug.Print Ev(i).Name; " = " & Ev(i).Value
      Next
   End If
End Sub