Thank you for your reply and excuse me if this is offtopic but it seems this problem of gaming is very common in windows for users who have multiple monitors and use steam in big picture mode.
I found a small software who is able to disable and enable the windows taskbar via a small gui or via a key combination (Altl+T):
Taskbar Eliminator
Now i "only" need to learn the basic of batch files creation and make one who include all following actions :
- Noecho command?
- switching DF profile via a key combination (sendkey command?)
- Wait command (500) to give time to switch?
- Launch Taskbar Eliminator with the minimized option via run command?
- send key combination (Alt+T) to kill the taskar (sendkey command?)
- Launch SBP via (run command?)
Finally i could assign this bat file to a hotkey and simply press it to solve a problem steam seems (?¿?) unable to solve by itself.
A fixed SBP could be a great step to attract a mass of gamers using consoles who also have their window PC connected to HDTVs in dual monitor profiles and don't use it cause the multiple action needed to start to play.
I can't understand how steam let this possible market unexploited and only rely on SteamOS who only be successfull IF magically all games will be coded on linux!