SET(RIGHT_MARGIN)
     Allows you to set the right margin without setting the left margin.
  Syntax
     SET (RIGHT_MARGIN, buffer, integer)
  Parameters
     buffer               The buffer in which the margin is to be set.
     integer              The column at which the margin is to be set.  The
                          value must be greater than the value of the left
                          margin.
  Example
     The following statement causes the right margin of the buffer contained
     in the variable 'my_buffer' to be set to 132.  The left margin is left
     unchanged.
     SET (RIGHT_MARGIN, my_buffer, 132);
  Related Topics
     SET(LEFT_MARGIN)