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Not sure how to explain this properly as I'm not that well
versed with byref global static etc

I'm working on my new TF lib (see sig) and with the help
of Tuncay/Majkinetor I introduced a function to read a
text file and return a (named) global parameter.

TF("TextFile.txt") in it self works, so far so good.
It creates a global variabl T. T contains the text
from "TextFile.txt" and would be equivalent to
FileRead, T, TextFile.txt

TF("TextFile.txt",MyVar) also works, it creates a global
variable called MyVar but also creates the global var T,
so it would be equivalent to
FileRead, T, TextFile.txt
FileRead, MyVar, TextFile.txt

Initially I thought when I used the MyVar option it wouldn't
create the global T but over the last few days I found out it
does.

Of course it COULD have an undesired side effect if someone
uses T as a variable in their script and it replaces or creates T
without someone knowing. Personally I don't mind, but I wonder
if there is a solution

So I would like to use TF("TextFile.txt",MyVar) without it
creating a global var T - but it should create T if I simply
use TF("TextFile.txt"). I'm sure it makes no sense, but still
someone might understand what I mean

The script below is what I have and illustrates the behaviour described above, perhaps it makes it easier to understand. I fiddled with byref
etc but to no avail.

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AHK FAQ
TF : Text files & strings lib, TF Forum

So what you are saying is, when there is a 2nd parameter used, there shouldn't be made a global variable. That's happening here (unless you make b=0):I don't know what your purpose is, but I always try to avoid global variables. It's easier to use them, but it's prone to conflicts when you start including other scripts.

Thanks for your reply.No, that is not what I'm saying (told you it was confusing) The entire purpose is to create a global var for further processing, and I know about local/global. That isn't the problem.

TF("TextFile.txt") ; Works OK, creates T that is what I want, So far so good!

TF("TextFile.txt", MyVar) ; Works ALMOST OK, creates MyVar that is what I want, but it ALSO create a global var T (by definition it ALWAYS creates global var T)

MyVar is the name of the global var it SHOULD create, it does so that part works.

I don't want to have a global var T IF I create MyVar. Instead of one it generates two: MyVar and T, I just want MyVar

I don't know how to explain it, just try what I posted to see what I mean.

So again, TF("TextFile.txt", MyVar) should only create MYVAR not T as well.

_________________
AHK FAQ
TF : Text files & strings lib, TF Forum

Done that yesterday, but it seems it didn't help me then .
Before I go much further with this hocus-pocus code, I have another question:
If so, then it's like this:

Based on what i see jaco0646 has the right answer

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Formal request to Polyethene

Indeed, when I look further into it it seems quite good.
But if I play a bit with it, this code gives the same result. And that raises the question, why do I get the value content, if I nowhere declare something global? The answer lies probably here (from AHKHelp):

Thanks guys. Before I turned on my PC today I thought it must be very easy to solve, and guess what, it was

_________________
AHK FAQ
TF : Text files & strings lib, TF Forum

Without using global inside the function, you will not be able to dynamically reference T outside the function.

Although the issue it seems solved, I do have a question.

While testing I noticed that jaco0646 solutions works when I useBut when I remove the () e.g. a simple return, %output% it doesn't work when I nest a function call.

What does the () do in this particular case, don't see any explanation at http://www.autohotkey.com/docs/commands/Return.htm but haven't search documentation any further

Edit: the answer is on the page I linked to

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AHK FAQ
TF : Text files & strings lib, TF Forum

The explanation is on the Return page you linked to.

I'm so blind, thanks for showing me the errors of my ways.

How much fun it is to feel like a noob again (or still)

_________________
AHK FAQ
TF : Text files & strings lib, TF Forum