DGN to DWG from Excel

My goal is DGN to DWG conversion starting from an Excel workbook using VBA.

I have developed VBA macros to use AutoCAD from Excel and am venturing into VBA macros to use Microstation from Excel.

I have Microstation V8i on a Windows 10 computer.  I hope to ask a minimum number of questions and then start seeing the light bulbs illuminate (We'll see how that goes).

Question #1

My first step when using AutoCAD from Excel involves the lines below to identify the application I wish to access.

Public Const AC_Ver As String = "AutoCAD.Application.23" 'AC 2019
Public AcadApp As AcadApplication

What would be comparable code to use as a first step in using Microstation from Excel?