Using serial COM ports for test.

How do I open a serial port for communication using C++. What I am trying to do is talk to a modem through COM 1 of the PC.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Are we talking about dos/windows?   I believe you can use the ioctrl and open commands for getting the port.
Use CreateFile to open the COM1 device and then ReadFile/WriteFile/etc.


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Oh yeah, one other ---

Once open, you then use SetCommXxx and GetCommXxx to control modem, handshaking, and or timeouts.  All of this is very well covered in the SDK online documentation.

mvuAuthor Commented:
Thank you, i will look into.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.