I thought about adding a fancy thing to a project by having a tooltip displaying some results. Didn't know it was that complicated. I have been googling this for a while but didn't find something very clear. I was wondering how can I create a simple tooltip on the desktop on a console application. Like this picture
Sorry for the newbie question.
I'm a bit confused on what you're requesting here.
In your question, you state you want to create a tool-tip in a "console application". For console applications, you cannot create tool-tips because they are command-line interfaces.
Here are some resources if you want to create tool-tips in a Windows Forms or WPF application.