Connecting two computers with Windows 10 and Windows XP to the network

Good evening,

the problem may be very simple for others, not for me, because I did not do it in my life and that's why I write in this section.

Well, there is a program (irrelevant at this point) that is supposed to work in a network between two computers. It is necessary that one of the computers (from Windows 10) be a "server" and the other (with Windows XP) "workstation". The point is that they "see each other". The one with Windows 10 connects to the router via Wifi, the other the normal Ethernet connection.

The question is what to do, how to do, where to start? I am looking for the net and the concept I do not have how it should be, home network, local network, home group, or somehow different? As I wrote, for some it can be simple, not for me, because I did not do it, but please take it seriously. Thank you.

Computers connect to one router?
Both of them set the same homegroup?

Yes with one router.
Nothing was done, no home groups, nothing. I wrote above, I did not do something like that in my life, I have no idea what to do.

bpm wrote:

I did not do such a thing in my life, I have no idea what to do.

Google is not working?

I love such answers. Go to a tree and go to google.

Works and so what? If I knew what to look for, how to look and how to do it, I would not write here and ask for help. It's probably logical, right?

For example, for the first time in your life you see a car and tell you to drive it, will you go? I do not think so. Someone can tell you, there were no books?

Once again, if I knew what to do and what to look for, I would not ask for help. Where should I start? What to look for?

bpm wrote:

Works and so what? If I knew what to look for, how to look and how to do it, I would not write here and ask for help. It's probably logical, right?

No - you are waiting for a ready, the answer has already been made.

sosarek wrote:

Both of them set the same homegroup?

It took me two seconds

No, I'm not waiting for a cook. I am counting on help because I do not know myself completely.

You write about the home group, and I found a topic like this:

https://www.elektroda.pl/rtvforum/topic2672017.html

Second answer: "Windows XP does not support the home group" And what do you say?

bpm wrote:

Second answer: "Windows XP does not support the home group" And what do you say?

I like it for the summer, if you read it you would know that computers should work in the same workgroup, on Windows 7 it is simply easier to configure.
In short - PPM on My Computer - Properties ...

bpm wrote:

the second (with Windows XP) "workstation".

Is SP3 installed there (on this XP)?

What does the author mean by saying that computers are to be seen? In a network environment? Is it possible to view shared resources? Should they ping? Or maybe it is not about the TCP protocol at all? What is the operation of this "irrelevant" program?
The answer may be simple, but you must specify the question or provide more details.