How to concatenate files by calling Windows Shell with VBA - vba

Question

I am trying to write some VBA in Excel that will concatenate .csv files by executing the copy and more commands in the Windows Shell.
This code successfully creates an empty file concat_target.txt (into which the others will be concatenated):
Shell ("cmd.exe copy /b NUL " & """\\path\to\network\folder\concat_target.txt""")
However, this code does not have the intended effect of saving file_1.txt as file_1.concat_temp (skipping the header):
Shell ("cmd.exe more +1 " & """\\path\to\network\folder\file_1.txt""" & " > " & """\\path\to\network\folder\file_1.concat_temp""")
In fact, every variation of the call to more that I have tried just pops up a console (that stays open) whereas the call to copy does not. The UNC network path has cursed spaces in it.
UPDATE:
It turns out that adding the /c flag to the more command does the trick (although it seems to have no effect on the call to copy). So this code is having the desired effect:
Shell ("cmd.exe /c more +1 " & """\\path\to\network\folder\file_1.txt""" & " > " & """\\path\to\network\folder\file_1.concat_temp""")
I will post the full solution for posterity once it is finished.

Answer 1

I don´t know why you are using 'more', but I would use other methods:
Shell ("cmd.exe /c type ""\\path\to\network\folder\file_1.txt"" >> ""\\path\to\network\folder\file_1.concat_temp""")
Notes:
redirecting with '>' will overwrite the file, losing previous contents
redirecting with '>>' will append the file (concatenate)
no need to separate every element in your string with " & " if they are all text (but I guess you already knew this)
no need to create an empty file first.
UPDATE:
OP was using 'more' to exclude the .csv table headers, as I hadn´t understood before.
So the 'type' command won´t work in this case.