Accessing Header Information from dbase or foxpro files

[Daniel Bedoya]

Question 1:
How can I read and write the header information of a dbase of foxpro file?

Question 2:
If I can do question 1, I want to encrypt the header of the file so my
application is the only one that can read it. The file is large almost 2 g
and ReadOnly (CD).
How can I change the header of a large(2g) and readonly file, and then open
it so my application will recognize it as a dbase or foxpro file?
Doing this will allow me to use the TTable components for that file?

Please attach some examples
Thanks