Index Structure collection

Hi there! I hope someone can help me with this question.
The short form is:
	how can I know when an index i sascending or descending?

The long form is:

I have a Codebase Delphi Application (actually Delphi 5.0), in which 
I have to check and, in case, modify, the structure of fields and tags 
in a collection of tables.

Regadring tags/indexes, which is the problem, I use the TAG4INFO structure

to build indexes:

  lData4File := d4Create(lcb,PFileName,
			    PFIELD4INFO(lfiPtr),
			    PTAG4INFO(ltiPtr));

actually, the TAG4INFO structure is as following:

  TAG4INFO = Record
     name       : PChar;
     expression : PChar;
     filter     : PChar;
     unique     : SmallInt;
     descending : Word;
  end;

Yhe problem arises when I have to check the tag/index structure for an 
existing table; I use the tag info functions to retrieve these
informations, 
which can be invoked once a pointer to the tag is captured:

	lsTAlias := t4alias(MyT4);
	lsTExpr := t4expr(MyT4);
	lsTFiltr := t4filter(MyT4);
	liTUnique := t4Unique(MyT4);

The problem is that there seems to be NO ****NTION FOR THE DESCENDING 
attribute of a tag! How can I know if an index is ascending or descending?


Best regards and thank you
Piero Salandin
P.S.: remove the nospam from the address to write directly.