how to mix unicodetext

I have a problem.
Here I want to join Unicodetextfile(1).txt, Unicodetextfile(2).txt, Unicodetextfile(3).txt ....file(99)'s.


foreach unicodetextfile around 2MB.

I use simple method
cmd,
copy/B file1 + file2 + file3 ... mixALL.txt


but VB can help me to completed ?

any advice please!