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I have no problem obtaining the MAC address of a client, given the IP of the client.
IP Helper API under Windows 2k allow the retrieval of the MAC address given the
IP address.
The question I'm having is, if the IP of the client is not given, and only its MAC address is known. Can Winsock send a packet to the client based on the client's MAC address? Likewise, can the client listen for this packet?
I am currently looking into NDIS for possible solution, but hopefully there is an easier solution than NDIS.
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The only way I am aware of to do MAC to IP would be if you could some how access a routers ARP table...
Probably didn't help any.
Rob
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Sorry for not clearly specifying my problem.
I need to communicate MAC between client and server.
By this I mean, to send a packet from the client to
the server (or vice versa) using ONLY a MAC address.
It seems to me that since the bottom layer of the OSI model
talks ARP, it is evident that Winsock communicate ARP
at a some stage. As such, further investigation leads
me to NDIS. Which is 2 layers below TCP/IP and UDP.
It is at this level that I am hitting the break wall.
Any solution you can offer at either the Winsock level
or the NDIS level would be great.
Thanks in advance for the help.
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Hi all!
I use appWizard to make a dialog base program. the default icon for my program will then be the MFC icon. I have a nice (32 X 32) icon file, and want to use it instead. the problem is when I imported this icon into the resource, the size becomes 16 X 16. This make the picture look very ugly. Besides this problem, was another one. What I did to change the icon was I changed the line:
//m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
with this line bellow:
m_hIcon = AfxGetApp()->LoadIcon(IDI_MY_LOGO);
after doing this, my icon was still not visible. I had to delete the MFC icon from the resource to make mine work.
Can someone please tell me how to change icon the proper way and how to load 32X32 icons
Thank you very much
Vu
vucsuf
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I tend to use the resource editor and clear out the contents of the IDR_MAINFRAME image and then paste my icon into IDR_MAINFRAME. Saves a lot of hassle,
Michael 
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Try this Code
HICON hIcon;
LPCTSTR lpIconName;
lpIconName = MAKEINTRESOURCE(IDI_MY_LOGO);
hIcon = ::LoadIcon(AfxFindResourceHandle(lpIconName, RT_GROUP_ICON), lpIconName);
GetActiveWindow()->SetIcon(hIcon, TRUE);
Remember:
LoadIcon can only load an icon whose size conforms to the SM_CXICON and SM_CYICON system metric values. Use the LoadImage function to load icons of other sizes.
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hi, ok my question is the following:
i have a win32 project in Visual C++ and i'm not using mfc whatsoever. Lets say i created a dialog window from a resource file, so it displays a window on the screen, still pure win32. Now if i go to the classwizard and i click "add new" i can add a new class based on another class. I pick CAsyncSocket as the base class and it adds the class to my win32 project. If i try to compile now i keep getting "Base Class Undefined" and it adds a line to the cpp file of the SocketClass "#include "script1.h" but that file doesn't exist.
Is this because you can't use the CAsyncSocket class without mfc or do i have to change some things to make it work?
Thanks for your time
Kuniva
Want, take, have.
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CAsyncSocket is part of MFC. you'd need to include MFC include files, and link to MFC libs, and enable "use MFC" in your project.
Sorry to dissapoint you all with my lack of a witty or poignant signature.
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We make a device which currently connects to the COM ports.
However of late I see COM ports are to be abolished mid-next year.
Does anyone have any info on programming USB???
I see there are hardware converters available to convert COM->USB.
What exactly do these do? Surely software written to address a COM port cannot access a USB in the same manner - so the adaptor is rendered useless???
--
The Obliterator
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Actually yeah it does, thanks.
The MS DDK looks promising, though I feel I have a lot of work ahead of me! 
Damn our customers and these ever changing standards! 
I'd seen usb.org but it seemed more orientated to the technical specification rather than what I was after.
--
The Obliterator
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Don't ignore Firewire. It's faster than USB and is great for hanging multiple storage devices off a single machine.
1294a was just completed, doubling the speed of Firewire to 960mb.
I believe USB2 is only 400mb or so. Is that correct?
To hell with those thin-skinned pillow-biters. - Me, 10/03/2001
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Yeah, one customer has requested Firewire support... but as its not really supplied as standard on any PCs I would be very reluctant.
Besides I really don't see the need, our device is very low bandwidth (2 bytes every 38ms!)
Unless there are other advantages to Firewire???
Thanks anyhow though.
--
The Obliterator
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You mean beyond the fact that it always seems to be significantly faster than USB, or that the standard has been around long enough to be a mature spec, or the fact that you can plug your IDE drives (hard drives, CR-ROMs, CD-R/W's and DVD) into external firewire cases?
Nope, no other benefits...
To hell with those thin-skinned pillow-biters. - Me, 10/03/2001
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>>you can plug your IDE drives (hard drives, CR-ROMs, CD-R/W's and DVD) into external firewire cases?
Is this not the same for USB also??
I agree with the maturity and speed points though.
Problem is I need a solution thats widely available, that people can connect to their laptops, etc. USB seems to fit my needs about the best.
--
The Obliterator
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By design, USB has a cable length limit of 5 metres.
You are able to use up to 4 cables extenders to increase the distance to 25 metres, but no futher. So if your device is located more than 25 metres from your computer, USB is not the way to go. As far as I know, Firewire does not have this cable length problem.
My advise is to read the USB specification carefully and make sure the USB is the solution for your device, it does have some very important limitations.
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Thankyou, this was not an issue I was aware of. Though that should be more than adequate for our device.
I have downloaded volumes on the USB specification and look forward to a little light reading!
--
The Obliterator
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>> However of late I see COM ports are to be abolished mid-next year
Funniest thing i've heard all day.
Admittedly, today has been a bit slow. But that's utter chud anyway. People still use COM ports for Modems and stuff. And serial connections to telco apparatus. And most POS equipment is RS-232 (tils, receipt printers, barcode readers etc)
Sorry to dissapoint you all with my lack of a witty or poignant signature.
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Well, I hate to be the bearer of bad news, but Intel has publicly stated that they're going to abandon of "legacy device" support within the next year or so. This means bye bye to serial ports, parallel ports, PS/2 mouse ports, keyboard ports, etc.
I guess they want to throw everything onto the USB bus. It would certainly make for more efficient chipsets, but it would also force everyone to update their admittedly aging array of legacy devices. If Intel abandons these ports, you can most assuredly count on Microsoft following suit in subsequent versions of Windows.
To hell with those thin-skinned pillow-biters. - Me, 10/03/2001
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COM ports will be around a LONG LONG LONG LONG time. Might not be available on your standard PC system, but you will always be able to get them as addons.
Too much stuff needs a COM port.
Tim Smith
Descartes Systems Sciences, Inc.
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Yes I would tend to agree... but it makes it difficult to sell our kit if nots easy to use and connect.
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The Obliterator
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I don't find it funny... my day has gone from bad to worse! 
Whilst trawling around for USB info I read an extract from an Intel article clearly stating they plan to withdraw all legacy support. This includes serial, parallel and floppy drives!
They expect all users to use USB compliant devices instead.
Just how you are expected to repair Windows when it all goes pear shaped in the future I have no idea!
>>Funniest thing i've heard all day.
>>>> However of late I see COM ports are to be abolished mid-next year
--
The Obliterator
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FWIW, there are devices that connect to the USB and provide serial ports. I spent a few minutes looking through a PC Connection catalog and I found units from Belkin, Comtrol, Keyspan, Targus, and Tripp-Lite and they do not appear too expensive.
There are also software packages available to help with USB driver development. I think Blue River Systems has one and there are a few others.
Best of luck.
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Yes this was really part of my original question, thankyou.
I couldn't understand how an adaptor would allow the software to work without custom software mapping the USB as some kind of virtual COM port. Clearly this is the case, and I may explore these options as a short term fix. For anyone else with similar problems here is one such solution:
http://catalog.belkin.com/IWCatProductPage.process?Product_ID=66002
As for Blue River Systems, I will have a hunt for their stuff now and see whats on offer. Thanks.
--
The Obliterator
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One of my first vc++ applications...
What is the best way to open new windows 'in' an existing child window in a VC++/MFC/MDI application ? (e.g. based on MS VC++ sample 'mdi', with the 'hello' and 'bounce')
My application should open a child window (window_1).
Clicking in window_1 would result in a new child-of-child window inside window_1 (window1_1, window1_2 etc.)
Once that is working, I would like to draw a line between the windows. (e.g. arrow from border of window1_1 to border of window1_2)
If you have any solutions, pointers to code/doc etc. it will make me so very happy !
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