FXPARPOS()

       Finds position to insert record into FITS header.

       Finds the position to insert a record into a FITS header.  Called from
       FXADDPAR.

       Result = FXPARPOS(KEYWRD, IEND  [, BEFORE=BEFORE ]  [, AFTER=AFTER ])

       KEYWRD  = Array of eight-character keywords in header.
       IEND    = Position of END keyword.

       None.

       Result of function is position to insert record.

       None.

       BEFORE  = Keyword string name.  The parameter will be placed before the
                 location of this keyword.  For example, if BEFORE='HISTORY'
                 then the parameter will be placed before the first history
                 location.  This applies only when adding a new keyword;
                 keywords already in the header are kept in the same position.
       AFTER   = Same as BEFORE, but the parameter will be placed after the
                 location of this keyword.  This keyword takes precedence over
                 BEFORE.
       If neither BEFORE or AFTER keywords are passed, then IEND is returned.

       None.

       None.

       KEYWRD and IEND must be consistent with the relevant FITS header.

       None.

       Data Handling, I/O, FITS, Generic.

       William Thompson, Jan 1992.

       William Thompson, GSFC, January 1992.

       Version 1, William Thompson, GSFC, 12 April 1993.
               Incorporated into CDS library.

       Version 1, 12 April 1993.
       Converted to IDL V5.0   W. Landsman   September 1997

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