Lock mouse in application

For so long the minecraft windows 10 edition has a problem it doesn't keep the mouse locked it hasn't gotten fix and there has already been ton of updates. Lots of people have already reported this and it hasn't been fix now if the Minecraft launcher is a replacement for window 10 edition please tell how I can exchange cause I'm assuming with that one it will keep the mouse locked on the application. I know proof is needed of purchase and I'll send screenshot of me owning minecraft in the windows store. Just please either give the launcher as an exchange for the windows 10 edition or fix the windows 10 edition. Please