hello,
Sounds like you maybe able to use the Dir function to retrieve all the files in the folder and possibly FSO (FileSystemObject) to open, read and process the file. FSO is available by going to "References" and selecting Runtime Scripting, I believe. You may also need to reference Excel's Object Model.
The second option maybe is to use Excel Object Model to process the data in the text files w/out FSO. Excel's object model may provide a way to access the csv file, input the delimiters of the file, if any and then import data into the spreadsheet, much like Excel's Data Import wzd w/out the interface.
In either case, I think you have reference Microsoft Excel Object Model in vb.
HTH.