Setting environment variables in GPO

[X-13]

I'm trying to set an environment variable through GPO, and I'm hitting a wall.

 

The idea is that I set the variable and the desktop background is set to the same one as the login screen...

 

At first I was using "wmic desktopmonitor get screenheight" [and screenwidth] so that I could use "background%height%x%width%.jpg" as the desktop.

 

But it didn't work...

 

 

I'm now poking "for /f "tokens=2 delims==" %%a in ('wmic desktopmonitor get ScreenHeight /value') do set hres=%%a" which works for a fraction of a second... then sets hres as nothing.

 

I think it's picking up the second output.

 

Is there a way of getting it to only accept numbers? I've tried adding in "echo %%a| findstr /r '^[1-9][0-9]*$'" but it looks like it crashes CMD.

 

 

[And yeah, I'm surprisingly motivated when I'm trying to be lazy...]

[X-13]

Bump.

 

Anyone have any ideas?

[X-13]

Ok... What's wrong with this:

 

for /f "tokens=2 delims==" %%a in ('wmic desktopmonitor get screenheight /value') do (if /i %hres% LSS %%a (set hres=%%a))

 

Because it just sets hres as 900.

 

This is what I get from "wmic desktopmonitor get screenheight"

 

C:\windows>wmic desktopmonitor get screenheight /value




ScreenHeight=




ScreenHeight=1080




ScreenHeight=900

 

 

I don't get it... 1080 is more that 900, so why is resetting the variable?