Tandy 600 Programmer's Reference Manual page 91

Function
08h
-
Get
Field ID
Parameter
Block:
00:
FILE-HANDLE
File to
access
01:
FIELD_NAME
Pointer
to
field
name
Return Value:
AX:
STATUS
Field
Identifier
or Err
The
FILEHANDLE
parameter
contains the
file
handle
for
an
open database
file.
The
FIELDNAME
parameter
contains the
offset
from
the
segment
in
DS
of
the character
string
specifying the
name
of
the
field.
The
field
name
string
is
an
ASCIIZ
string
up
to
16 characters
in
length.
The
value returned
in
AX
will
be
the Field Identifier
to
use
when
referring to this field.
Error
Returns:
86