GET_INFO(MARKER_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
 marker variable:

 Parameter 2     | Return Value  (Parameter 1 is a marker variable)
 ----------------+----------------------------------------------------------
 "before_bol"    | (1 or 0) - Indicates whether the marker is located
                 |            before the beginning of a line
 "beyond_eob"    | (1 or 0) - Indicates whether the marker is located
                 |            beyond the end of a buffer
 "beyond_eol"    | (1 or 0) - Indicates whether the marker is located
                 |            beyond the end of a line
 "bound"         | (1 or 0) - Indicates whether the marker is attached
                 |            to a character or is detached (free)
 "buffer"        | Buffer   - Buffer in which the marker is located
 "glyph_offset"  | Integer  - Number of character positions by which the
                 |            marker is offset from the nearest character
                 |            or from the beginning of a tab.  A marker
                 |            for an attached position always returns 0
 "left_margin"   | Integer  - Current left margin setting of the line
                 |            containing the marker
 "middle_of_tab" | (1 or 0) - Indicates whether the marker is located in
                 |            in the middle of a tab
 "offset"        | Integer  - Number of character positions between the first
                 |            character of the record and the marker location
 "offset_column" | Integer  - Number of screen columns between the beginning
                 |            of the current record and the marker location
 "record_number" | Integer  - The record number of the line containing the
                 |            specified marker.
 "right_margin"  | Integer  - Current right margin setting of the
                 |            line containing the marker
 "video"         | Keyword  - Video attribute of the marker; returns NONE
                 |            if the marker was created with the parameter
                 |            FREE_MARKER
 "within_range"  | (1 or 0) - Indicates whether the marker is in the range
                 |            specified by parameter3.  Note that parameter3
                 |            must be a range variable specifying the range
                 |            to be searched.