Library /sys$common/syshlp/TPUHELP.HLB  —  GET_INFO(WINDOW_VARIABLE)
  GET_INFO(WINDOW_VARIABLE)

  For an overview of the GET_INFO built-in, see the HELP topic GET_INFO.
  The following strings can be used for parameter2 when parameter1 is a
  window variable:

  Parameter 2    | Return Value (Parameter 1 is a window variable)
  ---------------+-----------------------------------------------------------
  "before_bol"   | (1 or 0) - Returns 1 if cursor is to the left of the
                 |            the current line's left margin; otherwise 0.
                 |            The return value  has no meaning if "beyond_
                 |            eob" is true.
  "beyond_eob"   | (1 or 0)   Indicates whether the cursor is located after
                 |            after the end of the current buffer.
  "beyond_eol"   | (1 or 0) - Indicates whether the cursor is beyond the end
                 |            of the current line.  The return value has no
                 |            has no meaning if "beyond_eob" is true.
  "blink_status" | (1 or 0) - Indicates whether BLINK is one of the video
                 |            attributes of the status line
  "blink_video"  | (1 or 0) - Indicates whether BLINK is one of the video
                 |            attributes of the window
  "bold_status"  | (1 or 0) - Indicates  whether BOLD is one of the video
                 |            attributes of the status line
  "bold_video"   | (1 or 0) - Indicates whether BOLD is one of the video
                 |            attributes of the window
  "bottom"       | Integer  - The number of rows or the last visible row of
                 |            the specified window or the specified window's
                 |            text area.  The third parameter can be any
                 |            of the following keywords:  WINDOW, TEXT,
                 |            VISIBLE_WINDOW, VISIBLE_TEXT.
  "bound"        | (1 or 0) - Indicates whether the cursor is located on a
                 |            character
  "buffer"       | Buffer   - The buffer associated with window
                 | 0        - if none
  "current_row"  | Integer  - Row in which the cursor was most recently
                 |            located
  "current       | Integer  - Column in which the cursor was mot recently
   column"       |            located
  "key_map_list" | string   - The string naming the key map list associated
                 |            with the specified window.
  "left"         | Integer  - The number of the leftmost column or leftmost
                 |            visible column of the specified window or the
                 |            window's text area.  The third parameter can be any
                 |            of the following keywords:  WINDOW, TEXT,
                 |            VISIBLE_WINDOW, VISIBLE_TEXT.
  "length"       | Integer  - The number of rows or visible rows in the specified
                 |            window or the specified window's text area.
                 |            The third parameter can be any
                 |            of the following keywords:  WINDOW, TEXT,
                 |            VISIBLE_WINDOW, VISIBLE_TEXT.
  "middle_of_    | (1 or 0) - Indicates whether the cursor is in the middle
   tab"          |            of a tab. Returns 1 if insert a space will not
                 |            cause white space to be added to the line; 0
                 |            otherwise.  The return value has no meaning if
                 |            "beyond_eob" is true
  "next"         | Window   - Next window in DECTPU's internal list
                 | 0          if last
  "no_video"     | (1 or 0) - Indicates whether the video attribute of the
  "no_video_     | (1 or 0) - Indicates whether the video attribute of the
   status"       |            window's status line is NONE
                 |            window is NONE
  "original      | Integer  - Screen line number of the bottom of the window
                 |            when it was created (NOT including the status
                 |            line)
  "original_     | Integer  - Number of lines in the window (including the
   length"       |            status line)
  "original_     | Integer  - Screen line number of the top of the window
   top"          |            when it was created
  "pad"          | (1 or 0) - Indicates whether the window is blank-padded
                 |            at the right
  "previous"     | Window   - Previous window in DECTPU's internal list
                 | 0        - if first
  "reverse_      | (1 or 0) - Indicates whether REVERSE is one of the video
   status"       |            attributes of the status line
  "right"        | Integer  - The number of the last column or the last
                 |            visible column of the specified window
                 |            or the window's text area. The third parameter can
                 |            be any of the following keywords:  WINDOW, TEXT,
                 |            VISIBLE_WINDOW, VISIBLE_TEXT.
  "screen_update"| (1 or 0) - Indicates whether the window may be updated
  "scroll"       | (1 or 0) - Indicates whether scrolling is enabled for the
                 |            window
  "scroll_amount"| Integer  - Number of lines to scroll
  "scroll_bar"   | Widget   - The specified scroll bar widget if it exists,
                 |  or 0      0 if the widget does not exist.  The third
                 |            parameter can be either of the following
                 |            keywords:  HORIZONTAL or VERTICAL.
  "scroll_bar_   | (1 or 0) - Indicates whether automatic adjustment of
   auto_thumb    |            the scroll bar slider is enabled. The third
                 |            parameter can be either of the following
                 |            keywords:  HORIZONTAL or VERTICAL.
  "scroll        | Integer  - Bottom of the scrolling area; this is an offset
   bottom"       |            from the bottom screen line
  "scroll_top"   | Integer  - Top of the scrolling area; this is an offset
                 |            from the top screen line
  "shift_amount" | Integer  - Number of columns the window is shifted to the
                 |            right or the left.
  "special_      | (1 or 0) - Indicates whether SPECIAL_GRAPHICS is a video
   graphics_     |            video attribute of the window's status line
  "status_line"  | String   - Text of status line
                 | 0        - if none
  "status_video" | Keyword  - If there is no video or only one video attribute
                 |            for the window's status line, the appropriate
                 |            video keyword is returned (NONE, BLINK, BOLD,
                 |            REVERSE, UNDERLINE, or SPECIAL_GRAPHICS)
                 | 1        - if there are multiple video attributes
                 | 0        - if there is no status line
  "text"         | Keyword  - Indicates the keyword used with SET(TEXT...) to
                 |            control text display in a window.  The keywords
                 |            can be returned are BLANK_TABS, GRAPHIC_TABS,
                 |            or NO_TRANSLATE
  "top"          | Integer  - The number of the first row or first visible
                 |            row of the specified window or the window's
                 |            text area. The third parameter can be any
                 |            of the following keywords:  WINDOW, TEXT,
                 |            VISIBLE_WINDOW, VISIBLE_TEXT.
  "visible"      | (1 or 0) - Indicates whether window is mapped
                 |            to the screen and is not occluded
  "visible_top"  | Integer  - Screen line number of the visible top of the
                 |            window
  "visible_      | Integer  - Screen line number of the visible bottom of the
    bottom"      |            window (NOT including the status line)
  "visible_      | Integer  - Visible length of the window (including the
   length        |            status line)
  "underline_    | (1 or 0) - Indicates whether UNDERLINE is one of the video
   status"       |            attributes of the status line
  "underline_    | (1 or 0) - Indicates whether UNDERLINE is one of the video
   video"        |            attributes of the window
  "video"        | Keyword  - If there is no video or only one video
                 |            attribute for the window, the single video key-
                 |            word is returned (NONE, BLINK, BOLD, REVERSE,
                 |            or UNDERLINE)
                 | 0        - if there are multiple video attributes
  "width"        | Integer  - Width of the window
  ---------------+-----------------------------------------------------------
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