Interfacing Parallel Port Using Visual C++

I've been searching around a lot to find some straight forward solution to deal with parallel port using Visual C, but after around a week of searching and wasting time got the solution still in a quite indirect way...so thought of writing it here...

Tools Required for Interfacing Parallel Port in Visual C++

1. Microsoft Visual Studio

2. inpout32.dll (www.logix4u.net)

3. inpout32.lib (www.logix4u.net)

4. LPT.exe (http://neil.fraser.name/software/lpt/)

Step and Code for Parallel Port Interfacing.

1. Creat a new Visual C++ Project using Visual Studio

2. Copy the inpout32.dll and inpout32.lib into your project directory

3. Goto project properties (Alt+F7), Expand Configuration Properties, Expand Linker, Click on Input, and type inpout32.lib in Additional Dependencies row and click Ok

4. Open the C source file of the project and code

#include "stdafx.h"

#include "stdio.h"

#include "conio.h"

#include "string.h"

#include "stdlib.h"

/* ----Prototypes of Inp and Outp--- */

short _stdcall Inp32(short PortAddress);

void _stdcall Out32(short PortAddress, short data);

/*--------------------------------*/

void main(void)

{

int Data; //Data to be sent on parallel port

Out32(0X378,Data); //if Inp32(0x378); used then it will take input from parallel port

}

now to check the working of the program execute LPT.exe it will start monitoring your prarallel power status, and you may check the code you just compiled.

Best of Luck