>So that means if a 10 pops up when I am adding a Memo field to an existing table using VFP 6.0 that that table was originally created in Fox 2.x? Is that how it happened in this case? Because I am not using Fox 2.x only VFP 6.0.

Or you used COPY TO...TYPE FOX2X, or are using a table created by something other than VFP that uses the older file format, or any of about a dozen other things. The one thing you can be certain of is that the table structure was not modified by VFP.