SET(SYSTEM)

 Makes a buffer a system buffer.  This is useful when creating your own
 editor in which you want to distinguish system buffers, such as a paste
 buffer, from those that users can edit.  VAXTPU does not handle system
 buffers differently from user buffers; VAXTPU merely keeps track of which
 buffers have been designated as system buffers.  It is the application
 layered onto VAXTPU that gives system buffers their special
 characteristics.

 Once a buffer is made a system buffer, it cannot be reset to being a user
 buffer.

 Syntax

    SET (SYSTEM, buffer)

 Example

 The following statements create a paste buffer and make it a system
 buffer:

    paste_buffer := CREATE_BUFFER ("paste");
    SET (SYSTEM, paste_buffer);

 Related topics

    SET(MODIFIABLE)   SET(NO_WRITE)   SET(OUTPUT_FILE)   SET(SYSTEM)