I have a question but there's no template for a question

### Microsoft PowerToys version

0.1

### Installation method

PowerToys auto-update

### Area(s) with issue?

Environment Variables

### Steps to reproduce

General Question about environmental variable creation and elimination.

I was looking for a variable that was created under a process I was debugging. I can't seem to find it anywhere. Shouldn't I be able to see it if it's referenced in a script that referenced it even if it's null? Or is it literally not a variable if null?

1. If the variable processFound first appears as shown below would it be created as an environmental variable at this point?

Set "processFound="

2. If the answer is to #1 is NO would it appear in the Environment Variables after the statement below?

Set "processFound=1"

If the answer to #1 was YES than the question above is irrelevant as the value would be updated.

If the answer to #2 was YES then would it be removed from the Environment Variables if I executed the statement below?

Set "processFound="

If the answer to #2 was NO then I have a problem.

If the answer to #3 is YES than I'm good.

If the answer to #3 is NO then how and when is it removed from the Environmental Variables?

Would it show under my profile or the system? What determines which list it become part of?

### ✔️ Expected Behavior

_No response_

### ❌ Actual Behavior

_No response_

### Upload Bug Report ZIP-file

_No response_

### Additional Information

_No response_

### Other Software

_No response_

No file, test, or entry point is identified. First clarify whether this is a support question or a documentation change, then verify the described cmd.exe SET behavior and the distinction between process, user, and system environment variables. Done would be a documented, authoritative answer or a narrowed documentation issue.

Written by the indexing model from the issue text.