WindowOpen_Ex ( win_num, title$, x, y, w, h, flag, vsync )
Opens a graphics window.
Set x and y to WINDOWPOS_CENTERED to position window in middle of screen.
Set vsync to False to disable vsync.
FLAG 0 - window
FLAG 1 - Fullscreen
FLAG 2 - Borderless Window
FLAG 3 - Resizable
FLAG 4 - Hidden
Note: The constant WINDOWPOS_CENTERED can be used to automatically position
the window at the center of the desktop.
Example: