Hi 
How to hide a application window ( not console ) on start (this created by al_create_display), and then show it.
It is possible by allegro?
HWND mywnd = al_get_win_window_handle(display);
Ok, windows... but linux?
Or eventually minimize window...
You may try to initialize the window outside of desktop... yeah I know that's bad solution, but Allegro doesn't seem to implement any of such functionality.
http://stackoverflow.com/questions/4530786/xlib-create-window-in-mimized-or-maximized-state
You might be able to do it on X if you can get a display pointer. You might have to hack allegro to return the x-window for a given display.
I always wondered why Allegro has a way to get the window handle on Window, OSX and I think even iOS but not Linux...