Argox PA-20 Programming Guide Manuale Utente Scaricare il pdf (Pagina 66)

PT-20 Programming Guide

Returns：

When char * buffer = NULL, functions will pass the data size back. Read

defeat: Pass back - 1.

When char * buffer ≠ NULL. Read succeed: Pass 1 back; Read defeat:

Pass back - 1.

ReadRecord

Purpose：

Use this function to read the data of appointed record.

Syntax：

int ReadRecord(_DBMS* F_Search, int recordno, char* buffer);

Example call：

char str_buffer[30];

ReadRecord (&fsearch,5,str_buffer);//Reading the data of sixth record,

and store to “str_buffer”.

Includes：

#include “DBMS.h”

Description：

int recordno : Read of record position。

char* buffer : Read the storing space of field。

Returns：

When char * buffer = NULL, functions will pass materials size back. Read

defeat. Pass back - 1.

When char * buffer does not equal NULL. Read succeed. Passing 1 back;

Read defeat. Pass back - 1.

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Argox PA-20 Programming Guide Manuale Utente Pagina 66