VMS Help  —  RTL Routines, SMG$  SMG$BEGIN_DISPLAY_UPDATE
    The Begin Batching of Display Updates routine saves, or batches,
    all output to a virtual display until a matching call to SMG$END_
    DISPLAY_UPDATE is encountered.

    Format

      SMG$BEGIN_DISPLAY_UPDATE  display-id
Additional Information: explode extract
Returns Argument
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