Check out this post, it has more information than you need, but I think if you take that basic code and strip out all of the extra stuff and hardcode your message into the message box, you can get it to work. It’s not formatted nicely, but it should be able to serve your purpose. You will have to do this is an assembly dashboard (you have to deploy it) and then customize that to get this to work. (I’m pretty sure.) I’m sure @Chris_Conn will come by and show you how.
MessageBox.Show("CSV: " + myCSV);
source[0] = myCSV;
System.IO.File.WriteAllLines(to,source);
So probably something like this.
MessageBox.Show("type your tips here");
Plus all of the per-requisite stuff with the button.