Someone said I could access FoxPro-type indices.  What
 is the difference between FoxPro indices and CA-Clipper indices?
 What gain can I get from doing that, and how?

 First off, there are several advantages to using a FoxPro-like
 index scheme.

 .CDX files can contain more than one "tag," each of which relates
 to an index key.  Therefore you can drop all your many CA-Clipper
 .NTX files by converting each to a "tag" within a single .CDX file.
 This also lets you always open a file with USE <file> INDEX <file>
 with assurance that you got all the tags.  Better still, when
 you perform a plain USE <file>, the driver will automatically
 find and open a corresponding .CDX file with the same base name
 as the datafile.

 Replaceable Database Drivers which support FoxPro-like files are:

     * The SIx Driver by Successware
     * Comix by Loadstone
     * The DBFCDX driver already included in CA-Clipper 5.2e
     * The DBFCDX driver in CA-Clipper 5.3 *is* Comix.

 SIx itself does not give you Rushmore lookups, but it is shipped
 with an add-in called MACH which does.  Likewise Comix has an
 accompanying library called ClipMore which does the same thing.