Name

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      FXBSTATE()

Purpose

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      Returns the state of a FITS binary table.
  Explanation : This procedure returns the state of a FITS binary table that
              was either opened for read with the command FXBOPEN, or for
              write with the command FXBCREATE.
  Use : Result = FXBSTATE(UNIT)
  Inputs : UNIT = Logical unit number returned by FXBOPEN routine.
                        Must be a scalar integer.
  Opt. Inputs : None.
  Outputs : The result of the function is the state of the FITS binary
              table that UNIT points to. This can be one of three values:
                      0 = Closed
                      1 = Open for read
                      2 = Open for write
  Opt. Outputs: None.
  Keywords : None.
  Calls : FXBFINDLUN
  Common : Uses common block FXBINTABLE--see "fxbintable.pro" for more
              information.
  Restrictions: None.
  Side effects: If UNIT is an undefined variable, then 0 (closed) is returned.
  Category : Data Handling, I/O, FITS, Generic.
  Prev. Hist. : None.
  Written : William Thompson, GSFC, 1 July 1993.
  Modified : Version 1, William Thompson, GSFC, 1 July 1993.
  Version : Version 1, 1 July 1993.
      Converted to IDL V5.0 W. Landsman September 1997