Introduction    Screen
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 BoxClose()      Closes a light focus window
 BoxDelete()     Clears contents of a light focus window
 BoxOpen()       Opens a light focus window
 BoxMessage()    Writes a message in a light focus window
 BoxPush()       Makes a pushing effect in a light focus window
 BoxQuery()      Makes a query and returns a logic value
 BoxTurn()       Turns on/off a light focus window
 BoxWarning()    Shows a warning in a light focus window
 Fascinate()     Makes an effect in the screen
 FastPrint()     Prints a message in screen
 File2Scr()      Restores screen from a file
 GetChar()       Returns a character from the screen
 Implode()       Restores a saved screen region
 Message()       Displays a string to the screen
 NewBox()        Makes effects opening windows with tittle and shadow
 Query()         Makes a query and returns a logic value
 RestScr()       Restores a saved screen region
 SaveScr()       Saves a screen region
 Scr2File()      Saves the screen to a file
 Screen()        Clears the screen with optional color and string
 SetFont()       Changes the font of characters
 SetFontChar()   Changes the font of a character
 Wall()          Simulates a wall
 Warning()       Shows a warning at line 24
 Window()        Shows a window with optional tittle and shadow