How to open COMXX files(serial port)

Question

I\'ve problem with serial port.

I\'ve written a program that can read ports COM1 to COM9, but can open COMXX(like com10, com11, etc.)

I\'ve searched and lear

Answer 1

You need to escape the backslashes in the filename parameter:

myPort = CreateFile("\\\\.\\COM14",
              GENERIC_READ | GENERIC_WRITE,
              0,    /* exclusive access  */
              NULL, /* no security attrs */
              OPEN_EXISTING,
              0,
              NULL );

You're also trying to open COM port 14. Do you really have 14 COM ports on your machine? Try COM1 instead.