The order of port names returned from GetPortNames is not specified. Use the GetPortNames method to query the current computer for a list of valid serial port names. For example, you can use this method to determine whether COM1 and COM2 are valid serial ports for the current computer. The port names are obtained from the system registry (for example, HKEY_LOCAL_MACHINE HARDWARE DEVICEMAP SERIALCOMM). If the registry contains stale or otherwise incorrect data then the GetPortNames method will return incorrect data.
Using the Setup API to enumerate serial ports for selection with list boxes and drop-down combo. Ready-to-use serial port enumeration list box. Download demo. Enumerate Serial Ports Vb6 Installer. (you need registration for download only). • CEnumerateSerial v1.31 A C++ class to enumerate serial ports.
Bradley.jarvis wrote:I cant believe you use goto statements! But looks ok apart from that. Well, the code is written in C, so I can't benefit from C++ RAII techniques. This idiomatic use of goto is a convenient emulation, in my humble opinion, of the finally construct of Java and C#.
Consider the following challenge: try to rewrite in C the function ScanEnumTree without using goto so that the result is as compact and maintainable as in its current form. What do you get?
Thanks for your appreciation of the library. Vladimir Afanasyev 9-Sep-05 1:50 9-Sep-05 1:50 Enumerating Registry for device enumerating is not good style. I think right way to use SetupXXX and CM_XXX functions. You can see my articles: Serial ports. Enumeration and FIFO control.NET - Diving into System Programming - Part 1.NET - Diving into System Programming - Part 2.NET - Diving into System Programming - Part 3. Orfeas29 12-Apr-04 23:55 12-Apr-04 23:55 This is a general question regarding serial ports.
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How do you actually release and claim a serial port e.g. I have implemented a VirtualSerialPort and everytime I use a different port e.g. COM5, COM6 the ports stay registered and I cannot use them next time I reboot the system as they are registered in the registry. Is there a way of releasing those ports without having to delete them from the registry? Anyone have a clue? Hint: I want to change the status of the COM port in the 'Port Settings->Advanced->Com Port Number' from '(in use)' into a clear field for each COM port P.S.
CreateFile does not give you a handle if e.g. COM5 port was used by a device which is not present. So this port must be released in some way first.
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Rrjimlad 4-Dec-03 6:39 4-Dec-03 6:39 Hi There, I've found this code extremely helpful and useful, but I did have one niggle. I've tried running it on a couple of laptops (one Windows 2000 the other XP) and it seems to list every serial port that the registry has ever known, not just what's currently available. (For example, this is the result from the Windows XP machine: 'COM5' 'Communications Port (COM5)' 'COM1' 'Quatech PCMCIA Serial Port (COM1)' 'COM7' 'Quatech PCMCIA Serial Port (COM7)' 'COM1' 'Quatech USB Serial Port (COM1)' 'COM1' 'Prolific USB-to-Serial Comm Port (COM1)' Here I have 3 devices claiming to be Com1. Only one of these devices is presently Com1 - the Quatech USB Serial Port, although the others have been in the past. But how can I tell which one is presently Com 1? Any suggestions would be very welcome, RR.
Conrad Braam 20-Oct-03 1:50 20-Oct-03 1:50 Your function does not correctly enumerate 'virtual' devices like Ethernet extender or Ethernet serial servers more notably from Moxa (see: ). Doing so thru the registry works fine. Just so U know, I have been using the registry for 7 years now in production code >6000 coppies, and it works just dandy on all propper 32-bit (not necesarily 95/98) machines. Conrad - [email protected] Always do badly to start off, that way when you get the hang of it suddenly, everyone is surprised. Numento keygen crack free.