====== Windows Batch: Set Variables from Text File ======
So for example, if the text file reads:
<code>
http://website1.com
http://website2.com
http://website3.com
</code>

I can hopefully output them to variables in the batch. Example:
<code>
set var1="Line one of text file, ex: http://website1.com"
set var2="Line two of text file, ex :http://website2.com"
set var3="Line three of text file, ex: http://website3.com"
</code>

===== Method 1 =====
The FOR /F loop command can be used to read lines from a text file:
<code dos>
@echo off
setlocal ENABLEDELAYEDEXPANSION
set vidx=0
for /F "tokens=*" %%A in (sites.txt) do (
    SET /A vidx=!vidx! + 1
    set var!vidx!=%%A
)
set var
</code>

You end up with:
<code dos>
var1=http://website1.com
var2=http://website2.com
var3=http://website3.com
</code>

===== Method 2 =====
Here ya go! Have fun with this one.
<code dos>
(
set /p var1=
set /p var2=
set /p var3=
)<Filename.txt
</code>