How to select webpage HTML Input element list item

I have been trying to select a specific value of an Input selector on a webpage, without success
Below is the code (part of a much larger automation script) to find the input element which is successful. But have tried various input value selection methods with no success.
A solution would be most welcome

see also image snippets of html and input screenshots

 ' find & select Released Prices
        Set htmlColl = objInternetPage.getelementsbytagname("input")
        For Each htmlInput In htmlColl
            Select Case htmlInput.ClassName
                Case "x-form-text x-form-field x-combo-noedit"
                    If htmlInput.Value = "Not released prices" Then
                        Set objInput = htmlInput
                        Exit For
                    End If
            End Select
        Next htmlInput

        If objInput Is Nothing Then Stop
        
        ' Input has 2 values - item 0 = Released prices, and item 1 = Not released prices (default value)
        
        ' but cant select the list item
        ' like this
        objInput.selectedindex = 0
        ' or like this
        objInput.parentelement.Children.Item(1).selectedindex = 0
        
        
        ' this allows activation of the dropdown selector arrow
        objInput.parentelement.Children.Item(1).Click
        ' but cant select the list item like this
        objInput.parentelement.Children.Item(1).selectedindex = 0
        
        
        ' tried this to select Released prices - but no success (populates the input with the value, but does not change the input selection to Released prices item)
        objInput.Value = "Released prices"
        objInput.fireevent ("onchange")