Casio IT-2000W Technical Reference Manual page 220

Readout of Received Data
Acquires the first barcode in the reception buffer and writes it to the specified buffer. The reception
data SYNTAX is as follows:
SYNTAX
#include "obrlib.h"
int FAR PASCAL _export OBR_Read(void far *pBuf);
INPUT
pBuf = Pointer to the buffer that stores the received barcode
OUTPUT
The absolute value shows the number of characters in the received barcode.
The sign indicates the validity of the barcode.
> 0 Length of received data.
= 0 Either the reception acknowledgment is not performed (OBR_Stat function is
< 0 Valid data does not exist.
Note :
Before reading a barcode using this function, acknowledge reception with the OBR_Stat function.
Note that received barcode data will be cleared from the reception buffer after it has been read by the
OBR_Read function. This means that the following barcode can be read immediately after the
preceding one, even if there is an error, has been read.
Barcode
Fig. 8.33
not used) or there is no received data.
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