The AdxRtHistory Class of the AdxRtLib library is the older method of retrieving time series data (interday or greater only) retained as it is a Class of the AdfinX Real Time rtx.dll Library. There are two considerations to using AdxRtHistory, 1) it can only be used for Interday or greater time periods, NOT Intraday and 2) the field names are of the old form (DATE, CLOSE etc), dating from 3000 Xtra and Powerplus 32.
To retrieve the default (all) fields use .RequestHistory("*") and then, when the data has been returned, use the ExistingFields property, an array holding the field names. Note that, unlike RHistoryAPI there is no need to infer the underlying category.fieldname, the names are the same as those that would be used in the actual request.
In the Visual Basic Editor, Tools, References for the AdfinX Real Time (or look for rtx.dll in the X/Bin, Y/Bin or Z/Bin of the TR Eikon installation directory)
Dim WithEvents myAdxRtHist As AdfinXRtLib.AdxRtHistory Private Sub cmdGetInterday_Click() Set myAdxRtHist = CreateReutersObject("AdfinXRtLib.AdxRtHistory") With myAdxRtHist .FlushData .ErrorMode = Dialogbox .Source = "IDN" .ItemName = "VOD.L" .Mode = [H8].Value .RequestHistory ("*") ' "*" requests all fields. End With Exit Sub Private Sub myAdxRtHist_OnUpdate(ByVal DataStatus As AdfinXRtLib.RT_DataStatus) Dim c As Integer Dim availablefields As Variant ' If working with ALL fields request, can use .ExistingFields availablefields = myAdxRtHist.ExistingFields For c = 0 To UBound(availablefields, 1) Debug.Print availablefields(c, 0) Next c End Sub