See the Communication Functions in the Platform SDK: Files and I/O at msdn.microsoft.com
The first function in the list (so you can search for it if you like), is BuildCommDCB. You use CreateFile(…) to open a handle to a COM Port and then the Communication Functions to interact with it.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.