Serial Port programming using Visual studio .NET 2002 Enterprise

Hi all,

I would like to find out why programming the serial port using visual C++ from the Visual studio .NET 2002 failure

In the past I used to programme the serial communication port using visual C++ 6 from the Visual studio (without .NET version) and it happens to be fine. The <Windows.h> file is included for your info.

Regards

Vincent

You mean a VC6 application worked, but after upgrading to VC2002 it doesn't

In that case you'll have to give us more detail. which function fails, and which error code is returned

Without that I can only tell you to have a look at the serial port samples at www.codeproject.com

Yes, at home i use VC6 (no ,NET). Current at my work place, i use a new installation of visual studio.NET 2002 Enterprise = VC7

problems complain by the complier,

Could not find HANDLE, DWORD, COMMTIMEOUTS, DCB, GetCommState... so on and so for for the various instant needed to initialise the serial port. I'm puzzled by that because I have added the <Windows.h>. By right that should do the trick. At home it can compile and work. At work place it fails.

Below is part of my code sample. should be easy for u guys.

#include <Windows.h>
#define BUFSIZE 128

int main(int argc, char* argv[])
{
DCB myDCB;
COMMTIMEOUTS myTimeout;
DWORD bytesWritten, commStatus;
HANDLE hcom;
/*Specify the Serial Port to be Used "Com#" Where # is the Port Number*/
char myPort[] = "Com4";
char myData[100];
/*Open Comm Port with Read/Write access, Exclusive Access, No Security, Open Existing
No Overlapping IO, NULL Handler*/
hcom = CreateFile(myPort,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
if (hcom == INVALID_HANDLE_VALUE)
{
printf("Serial Port Open Error: %d\n",GetLastError());
return 0;
}
/*Setup Comm Port Input and Output Buffer Size*/
SetupComm(hcom,BUFSIZE,BUFSIZE);

/*Get Default DCB Values and Overwrite Required Values*/
if(GetCommState(hcom,&myDCB)==0)
{
printf("Serial Port Values Unavailable\n");
}
else
{
myDCB.BaudRate = CBR_9600;
myDCB.ByteSize = 8;
myDCB.Parity = NOPARITY;
myDCB.StopBits = ONESTOPBIT;
myDCB.fAbortOnError = TRUE;
myDCB.EofChar = 10;
if(SetCommState(hcom,&myDCB)==0)
{
printf("Unable to write Serial Port Configuration Values\n");
}
else
{
GetCommTimeouts(hcom,&myTimeout);
myTimeout.ReadIntervalTimeout = 50;
myTimeout.ReadTotalTimeoutConstant = 50;
myTimeout.ReadTotalTimeoutMultiplier = 10;
myTimeout.WriteTotalTimeoutConstant = 50;
myTimeout.WriteTotalTimeoutMultiplier = 10;
SetCommTimeouts(hcom,&myTimeout);
printf("Waiting for Data\n");
SetCommMask(hcom,EV_RXCHAR|EV_ERR);
WaitCommEvent(hcom,&commStatus,0);

if (commStatus & EV_RXCHAR)
{
ReadFile(hcom,&myData,20,&bytesWritten,0);
printf("Data Recieved: %s\n", myData);
}
else if(commStatus & EV_ERR)
{
printf("Error Reading From %s", myPort);
}
}
}
CloseHandle(hcom);
getch();
return 0;
}

1) For your information I uses the VC++.NET 2002. Its not VC++ 2005.

2) I have not remove any #include "stdafx.h".

3) I have added <Windows.h>

The error i receive was:

C2065: 'Closehandle' undeclared identifier

C2065: 'DWORD' undeclared identifier

C2065: 'COMMTIMEOUTS' undeclared identifier

C2065: 'DCB' undeclared identifier

C2065: 'HANDLE' undeclared identifier

I know this knows strange but it just happen this way... If possible can anyone with Visual studio .NET 2002 Enterprise

try compiling it

Thanx

Vincent