WindowMode ( visible, fullscreen, resizable, borderless, highDPI )

Returns a bitmask of the combined window flags that can be used in WindowOpen() to set the mode for the window.
Each flag is a boolean that determines whether or not to set that flag in the mask.

Example:
   my_window_mode = WindowMode(1,0,1,0,0)
   WindowOpen ( 0, "My App", WINDOWPOS_CENTERED, WINDOWPOS_CENTERED, 640, 480, my_window_mode, 1 )

   While WindowExists( 0 )
   Update()
   Wend

This will open a resizable 640 x 480 window and wait for the user to close it.