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Function 13h
-
Specify Sort
Key
Parameter
Block:
00:
FILEJHANDLE
File Identifier
01:
NUMBER_OF_KEYS
Number
of sort
key
fields
02:
SORT_KEY
Pointer to
sort
key
Return Value:
AX:
STATUS
Error
code
This
function
is
used
to
define
a
sort
key
for
the specified
database.
A
sort
key
is
made
up
of
a
series
of
sort
key
fields
which have
the following form:
DIRECTION
FIELDJD
byte
byte
=
Descending,
1
=
Ascending
Field to sort
As
many
sort
key
fields
may
be
specified
as
there are
fields
in
the
database
file.
The
sort
precedence
of
the
keys
is
according
to
the order
in
which
they are
specified.
Error
Returns:
97
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