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Function
ODh
-
Get
Field
From Open
Record
Parameter
Block:
00
01
02
03
FILEJHANDLE
FIELDJD
TRANSFEFLLENGTH
BUFFER
File Identifier
Field
Identifier
Number
of
bytes
to
read
Pointer to buffer
to
receive
data
Return Value:
AX:
STATUS
Number
of
bytes transferred
or Error
Code
The
FILE
HANDLE
parameter
specifies
the
file
handle
of
a
previously
opened
database
file.
The
FIELDID parameter
specifies
the
field
ID
of
the
field
to
access.
The
TRANSFERLENGTH
parameter
specifies
the
number
of
bytes
to
be
read from
the
field.
The
BUFFER
parameter
specifies the offset
from the
segment
in
DS
of
the
buffer
to
receive the transferred data.
On
return,
AX
will
contain the
actual
number
of
bytes placed
in
the
buffer.
The
bytes
transferred
will
always be
taken
starting at
the beginning
of
the
field
data.
It
is
not
possible
to
read a
field in
a
series
of partial
reads.
Error
Returns:
91
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