Is there someone who can show me how to receve data from the com port??

sorry, i don't know much about this, but CreateFile should be able to open the com port for you
i don't know much else, scour the Win32 API

edit: there is a communications section in Win32 API, it describes this
for example, use GetCommState and SetCommState to set like baud rate, parity, etc..

lilljocke,

Read the info here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/msdn_serial.asp

UCM was correct, you use CreateFile to open a port, and ReadFile/WriteFile to read and write from/to the port. Setting "interrupts" and handlers is more complicated. I use this technique to read data from a truck scale and write info to a slip printer and it works.

Another alternative is to use a "device driver" such as the WinIO library which you can find at www.internals.com This gives you access to the serial ports in a way which would be familiar to DOS programmers using in and out port instructions. I have never used this, but others say it works well.

hth,

farrier