Open an .exe file using a command shell

Hi all,

My final goal is to automate the process below. I prefer to explain my final goal since people could see potential issues that I have not foreseen in a simpler problem. But to keep things shorter, I will write farther below this simpler problem as an example of what I don't know how to do.

1-open a command shell (cmd.exe)
2-from the shell, launch a program ProgTest.exe calling a save file SaveTest.txt using the following syntax C:\...\ProgTest.exe C:\...\SaveTest.txt The result of this program is stored in memory as a set of lines with a format like:
id1;2;;;d;3;
id2;;t;;r;;
id3;A;;5;;8;
etc.
3-paste what is stored in memory in a spreadsheet (A1 receives id1;2;;;d;3; /A2 receives id2;;t;;r;; etc.)
4-then use the Excel tool "Text to columns", using Semicolon as a delimiter.
5...

If I could get the code to do what is below, I think that I should be able to take care of the remaining.

Having in A1 the following string "calc.exe", click on a button to launch the following macro:
1- copy the string from A1 ("calc.exe")
2- open the Command shell (cmd.exe)
3- paste the memory content
4- validate (Enter) the command and launch Calculator
5- go to A2
6- paste the memory content in A2 (still "calc.exe" in this case, but it should be the result from a program). Usually I know this part but I am not sure that this won't require some extra care since we left Excel to the command shell at some point.

I hope that this is clear enough,
Thank you for any help,
Regards.

Without providing the code, could someone having the knowledge tell me if this is possible or not? If it is, I will keep looking on the forums.
Thank you!