CMD Help

Alrighty guys.

I need some help with CMD.
I'm trying to code a program that changes the wallpaper of the desktop (all other methods are blocked). The way I'm attempting to do this is:

1. User is presented with a Windows select box which they need to select the photo
2. The program modifies the registry value for Wallpaper (I know it) with the new file location.

Problem no. 1# How do I get a windows select box? (like, code it in a .bat file)

 

All other methods are blocked.
Literally, the only thing we can do is run CMD.

 

Oh.
I'll try that then.

Thanks prectorian.