Unfortunately, I haven't used Excel 'programatically'. I've converted comma delimited files to spreadsheets by doing something like File > Open > (comma delimited text file name). Excel will then give you a dialog with options regarding how to parse the text file. Comma delimited is one of the main options. It seems like there must be a way to do this through an interface, command line, or something.
Chris R Mead
The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.