This is a newsgroup for Microsoft Access, a relational database program.
Such questions as yours are better asked in a Windows newsgroup, but you
should be able to do what you need by right-clicking the desktop and
selecting Properties.
You didn't specify Access. Even if you can change Windows settings such as
background by way of Access code, you should not mess with a user's settings
unless they specifically ask that you do so.
It is not always understood as clearly as one might hope that this is an
Access newsgroup. Many items get posted here that belong elsewhere. Some
like yours seem to belong elsewhere (it could have been a general Windows
question that had wandered into the wrong group).
Good luck with the project.
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