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  Argument
 
    page    Specifies current visual page
 
  Description
 
    The _SetVisualPage procedure selects the current visual page--the
    area of video memory that is currently visible. The active page is
    the area of video memory where text and graphics output is written.
    If the visual and active pages are the same, output is visible when
    it is written. By default, both the active and visual page are
    number 0.
 
    Note:  See the _SetActivePage help screen for animation
    techniques using multiple pages. The number of pages varies
    according to the hardware configuration and video mode. Use the
    _GetVideoConfig procedure to determine the number of pages
    available in the current mode.
 
  _GrStatus Returns
 
    _GrInvalidParameter