How to play 2 DS Emulator's (Not linking)

[Bobby1989]

Hello I'm Bobby, I'm new here ^^, I'm wondering how do you play 2 DS emulators like as in how ppl used to play zelda four swords on the gba, like you know how they had to press that option to still make the window playable without actually clicking on it? like unpausing the window without being in it, so me and my friend can lvl up seperately on Phantasy Star Zero, this has nothing to do with linking i just want me and my friend to just play and lvl up, so can anyone help me please?

[Toasty]

I don't do any DS emulation, but I anticipate that the person who helps you will probably need to know which emulator you are using.

[Agozer]

Something tells me that isn't possible, seeing how (at least) Windows can only focus on one screen at a time and only accepts input from the application that has focus. Correct me if I'm wrong, of course.