If you have device like Surface Pro 4 (2-in-1) it can detect if keyboard is connected or not and based on this, it turns Tablet mode on/off.
I've just tried running other Win10 apps (Facebook, OneNote, ...) and if you are in Tablet mode, title bar isn't shown but if you are not in Tablet mode (so Tablet mode is off), title bar is shown with close, maximize and restore buttons. So it seems MSpro should be able to read state of Tablet mode and show or not show title bar based on this.
EDIT: I've just found solution. Just disable Fullscreen mode in Settings --> Display settings and it works as described above.
I've just tried running other Win10 apps (Facebook, OneNote, ...) and if you are in Tablet mode, title bar isn't shown but if you are not in Tablet mode (so Tablet mode is off), title bar is shown with close, maximize and restore buttons. So it seems MSpro should be able to read state of Tablet mode and show or not show title bar based on this.
EDIT: I've just found solution. Just disable Fullscreen mode in Settings --> Display settings and it works as described above.
Tablet: Surface Pro 8,
Other: Strich BT-FP2, USB-MIDI connection to Kurzweil Forte 7