I am trying to understand how to convert files with Excel automation. I
see the parameter in the open method but I don't know what the possible
options are.

There is a readonly property Application.FileConverters but I don't know
how to do anything with that. I am new to VB so that is part of the
problem. VB says the fileconverters is a readonly property
fileconverters[index 1 as object], [index 2 as object], as object.
What does that mean? Is it a 2 dimensional array? How do I know what the
bounds of that are? How can I see what is in each entry?

What I am trying to do is open a non-excel file in excel without any
user interaction.

TIA
JO