While playing with Cortana (full description of the tests in the next article TBR), I found out it can't take a screenshot. If you ask Miscrosoft's personal assistant "Take a screenshot", it will simply reply with apologies:
"Sorry, I can't take screenshots for you"
So I did wonder why this exact answer. It's not that Cortana didn't understand my question, but that nope, no screenshots for you. Also note that if you don't ask exactly this (like "Take screenshot"), you'll be redirected to a beautiful bing search.
First option is Cortana literally can't take a screenshot.
It's easy to guess there is a way to programatically take a screenshot, with C++ or C#, the two main Microsoft programming languages, you can do that in less than 10 lines of code and it'd strange that developers at Microsoft spent time to write this specific answer instead of implementing a new feature.
And there might be the answer, I looked how to do a such thing using a the Universal Framework and couldn't find it. There are some ways to do a a screenshot with Windows Phone apps (as mentioned here), but the screen capture remains within the running application, it's not a full, real, screenshot. However, I might missed something, so if anyone can find a way, I'd glad to update this article. But if Cortana is actually made using this reduced version of the framework, we can imagine as well reduced (client side) functionalities.
Second option is Cortana can take a screenshot, but not for me.
Wait a minute... What does this mean? For whom Cortana can take a screen capture then?
Well, I don't want to raise the paranoia level, but we know that Microsoft can have today access to a lot of information from its users since windows 10 and its privacy settings. There's nowhere explicitly written they will send screenshots of your computer to their headquarters (However, I didn't read the full T&Cs, I'm too lazy for this), but yeah, that might be a thing, I mean, it's not ridiculous.
The Game Bar can take screenshots.
So here might be the missing link to somehow take a screenshot from Windows without pressing neither the PrintScreen key neither actually any key (let's say you're as lazy as me). However, if you ask Cortana to open the Game bar, it will simply answer you...
So yes... maybe it's easier to write down an answer for Cortana instead of coding the related action, unless everything is a privacy or security problem.