Request help about a client server application in C++

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I have to develop a client server application in c++ that must be able to to send command(ctrl/alt/shift,followed by a/b/...1/2/3) from server to an application that is actually in focus.

What I have tried:

I made only a client server but not the control command for the application in the server from the client

Posted 13-Mar-17 21:55pm

Member 12891988

Updated 13-Mar-17 22:23pm

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CPallini · Answer 1 · 2017-03-13T22:06:00

Solution 1

Quote:
I made only a client server but not the control command for the application in the server from the client

Well, no one prevents you in doing that.
If you have the client and the server and they are able to communicate, the next step is simple: send the 'commands' based on a simple protocol, and in the other side interpretate and execute them, giving feedback as appropriate. What is the hurdle, then?

Posted 13-Mar-17 22:06pm

CPallini

Comments

Member 12891988 14-Mar-17 4:49am

Thanks for your reply.
I do not know how I can send a command(ctrl+c for example) from client to the server.
I know how send a buffer of char or string but I do not know how I can send a combination of key from keyboard.

CPallini 14-Mar-17 5:23am

What's wrong in sendig the CONTROL key code (0x11) followed by the 'C' one (0x43)?

Member 12891988 14-Mar-17 5:59am

I do not know how to send a command from keyboard to interact with process on focus.
For example: I have in the server side machine firefox opened and when I press ctrl*f from my keyboard a searching bar was opened.
So I would do the same thing, but pushing ctrl+f from my client machine and open searching bar in firefox installed on server machine.
I just want to use command from my keyboard to interact with a window application.
and after I do not push enter or send,I only want that: if I push ONLY ctrl server must receive it, if i push ctrl+f server must receive it and so on.

CPallini 14-Mar-17 6:16am

Well, then you have to just intercept keystrokes on the client application and send them to the server. How to do that depends on your OS. On Windows you may look at the very documentation:
https://msdn.microsoft.com/en-us/library/windows/desktop/ms646268(v=vs.85).aspx

Member 12891988 14-Mar-17 10:31am

Thank you so much for your help.
I will try.
Regards

Member 12891988 18-Mar-17 6:11am

Hi,I need one more advise, I am aware that there are ways to check if a process is already running (via enumeration). However, I was wondering if there was a way to listen for when a process starts and ends (for example, notepad.exe) and then perform some action when the starting or ending of that process has been detected. I assume that one could run a continuous enumeration and check loop for every marginal unit of time, but I was wondering if there was a cleaner solution.
Thancks in advance
Regards

Jochen Arndt · Answer 2 · 2017-03-13T22:23:00

Solution 2

You can use a two channel communication. Once a connection has been established the server can create a new connection to the client to send the commands. In this scenario (and code implementation), the server acts now as client and your application as server (when your client opens a connection it creates another listening socket to handle commands from the server).

Posted 13-Mar-17 22:23pm

Jochen Arndt

Comments

Member 12891988 18-Mar-17 6:57am

Hi,I need one more advise, I am aware that there are ways to check if a process is already running (via enumeration). However, I was wondering if there was a way to listen for when a process starts and ends (for example, notepad.exe) and then perform some action when the starting or ending of that process has been detected. I assume that one could run a continuous enumeration and check loop for every marginal unit of time, but I was wondering if there was a cleaner solution.
Thancks in advance
Regards