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─────The FOCUSQQ Function───────────────────────────────────────────────────
 
     Invoking the FOCUSQQ function gives the focus to the window
     whose unit number is specified by the parameter IUNIT:
 
          dummy = FOCUSQQ(12)
 
     The function returns zero on success and a nonzero value on
     failure.
 
     The interface for FOCUSQQ, defined in FLIB.FI, is
 
          INTERFACE TO INTEGER*2 FUNCTION FOCUSQQ(IUNIT)
          INTEGER*2 IUNIT
          END
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