ftp.nice.ch/pub/next/unix/developer/plplot.3.0.s.tar.gz#/plplot/src/plgwin.c

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/* Switches to the command window (if one exits ) */

#include "plplot.h"

void plgwin()
{
      int level;

      glev(&level);
      if (level < 1) plexit("Please call plstar before calling plgwin.");

      grgwin();
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.