What would I need to do to connect a slab of wood to my window

>>968716
So without ANY kind of support under it? You will have to hang it from the wall or from the ceiling. Particle board will sag like a motherfucker under its own weight without support, let along with whatever will be on your desk. Even plywood or real wood will do the same with time and weight.

I wouldn't exactly call particle board a slab of wood, but....

you're pretty much going to have to have some kind of support to keep it up....keep it mind it doesn't have to be much, and it doesn't mean you'd have to put posts down to the floor

there are plenty of designs for simple brackets with 2x4s, or you could just use metal shelf ones

>>968716
Add square metal brackets to each side using screws and glue to prevent to board from sagging. Screw the board down.

Should be fine.

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Do this. Find studs. Floating desk thing. Some under flood lights.

>>968716
What you need, anon, is called a shelf bracket. Easy way to make them solid : https://www.youtube.com/watch?v=M5eztrgtRrI

>>969996
Woops wrong video
https://www.youtube.com/watch?v=jhnVvcLsp-8