How to make our app communicates with existed cmd.exe process

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Hi all ,
I face a problem about the standard redirection of input& output about cmd.exe . my exepcted process like below :
1) Manually run a cmd.exe (we can called it DestinationCMD here)instance .
2 Using our own app send commands to DestinationCMD.(e.g. ping 127.0.0.1)
3 Our own app auto-get the output from DestinationCMD when STEP2's job finish running.

NOTE: we can not programmatically running the cmd instance in STEP1;the whole process is indeed to communicates with an existed cmd which we manually startup at the begining. So i don't know how to redirect the input and output on this condition .

Any idea will be much more appreciated . whatever c++ or c# is OK .

Thanks

Posted 15-Aug-10 23:11pm

wenqing632

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Niklas L 17-Aug-10 2:37am

So, you are not allowed to recode the DestinationCMD, or have no access to do so?

wenqing632 17-Aug-10 3:56am

yep ! some guys said i can get DestinationCMD's handle , then send the keys . it's not good i think . may it's tough to wrap a loose controled process ! i don't know whether the Creatpipe API can contact with existed process .

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Niklas L · Answer 1 · 2010-08-16T00:51:00

Solution 1

Pretty much any Interprocess Communication[^] method can be used.

Posted 16-Aug-10 0:51am

Niklas L

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wenqing632 17-Aug-10 1:10am

Hi Niklas,
Thanks for your provide IPC solutions, and after i investigate them , i found both the server&Client actually will be under our designed while using IPC mechanisms , Go back to my condition , i really wanna find a solution to wrap the existed cmd.exe process and then to handle its' input and output stream . Maybe using the IPC way can resolve it , but sorry to say i am not good at this and even i can't find a clear schema for this .
Could you give me a raw working flow to simply tell the steps ? Thanks a lot !

ThatsAlok 17-Aug-10 2:24am

The whole idea of IPC is quite vast, please do provide specific method to do so!

wenqing632 17-Aug-10 3:49am

Ok, i saw API function [CreatePipe] which has WriteFile&ReadFile , does this func is feasible to wrap the existed cmd process which manually startup , and then we can send command & get output ? Thanks!