ncl_ngckop man page
NGCKOP — a function to check if a specified GKS workstation is open.
INTEGER FUNCTION NGCKOP(WKID)
int c_ngckop(int wkid)
(an input variable of type INTEGER) specifying a GKS workstation identifier.
The C binding argument descriptions are the same as the FORTRAN argument descriptions.
The function returns a "1" if the workstation identified by WKID is open, otherwise it returns a "0".
IOPEN = NGCKOP(WKID)
sets IOPEN to "1" if WKID is open and sets IOPEN to "0" otherwise.
To use NGCKOP or c_ngckop, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.
Online URL: http://ngwww.ucar.edu/ngdoc/ng/gks/gkshome.html
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.