Thread: mscomm for rs232

in visual basic there is a mscomm control for com ports, is there a class in c++ that does the same thing? trying to write to a hardware device connected to a com port. im using ms visual c++

thanks

You can CreateFile to open a handle to the COM port and then you can read and write to the port just as you do with files.

Take a look at MSDN Library and especially at the article called:

Serial Communications in Win32
Allen Denver
Microsoft Windows Developer Support
December 11, 1995

By the way, you could use CreateFile like this:

Code:

HANDLE hComm;
hComm = CreateFile( gszPort,  
                    GENERIC_READ | GENERIC_WRITE, 
                    0, 
                    0, 
                    OPEN_EXISTING,
                    FILE_FLAG_OVERLAPPED,
                    0);
if (hComm == INVALID_HANDLE_VALUE)
   // error opening port; abort

does the 2 zero's there mean comm1?

and another thing, i have bought $200 worth of books, if i buy another one that tells me how to say hello in dos and how to make databases, i am going to scream lol any ideas on an actual real world programming book?

I've had some frustrating experiences with serial communication over the years. I cant say that I can handle it good either, but here you have the source code for my rs232 class, used in an experimental project. I dont assure any level of quality, you have to add error handling as you think appropriate for your application. And, I remember that I mixed some with the timeout values, you may be better of removing that part of the code.
The Send() function uses a record length, this was a application-specific functionality that you might not need.

Good Luck!

As an addition to this thread, whilst in a TAPI setup, using getLineID, I return a handle to the device, through which a modem is comminucating with a modem (vice versa). This returns a handle which can be used as though called from CreateFile.
Big problems occur when attempting to readfile, in non-overlapped method.

Any help?