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N_XAMAKENDX()   Add a supplemental index to a table
N_XAMAKETBL()   Create table from specified arrays or string definitions
N_XDBF()        Get name of Btrieve file open in current area
N_XDEC()        Get number of decimal positions in specified field
N_XDROPNDX()    Remove supplemental index
N_XDSTRUCT()    Returns file structure string from currently open DBF
N_XERRLVL()     Set RaSQL/B error handling mode
N_XERRMSG()     Get text error message by passing error number
N_XERROR()      Get error code from most recent function
N_XFCOUNT()     Get number of fields in the current table
N_XFIELD()      Get Nth field name in current table
N_XFILTER()     Create client-server filter
N_XFRECSIZ()    Get length of fixed length portion of record
N_XINDEXKEY()   Get field list for specified index number
N_XINDEXTYPE()  Get attributes of a specified index
N_XLEN()        Get display length of specified field
N_XLOGIN()      Log program into Btrieve
N_XLOGOUT()     Log out user from Btrieve
N_XMAKEDBF()    Create extendedstructure DBF from current table
N_XMAKENAME()   Get valid Clipper field name from Btrieve field name
N_XMAKENDX()    Create a supplemental index for the currently open table
N_XMAKETBL()    Create table from extended structure DBF
N_XNUM()        Get the number of the specified field in current table
N_XPATH()       Set default path for Btrieve data files
N_XRASQL()      Verify the RaSQL library name
N_XRECSIZ()     Get display record size
N_XSAFETY()     Set overwrite safety on or off
N_XSEEK()       Retrieve record by index key
N_XSLEN()       Get internal, stored length of specified field
N_XSRECSIZ()    Get internal, stored length of record
N_XTRANCAN()    Cancel (rollback) transaction
N_XTRANOFF()    Stop transaction
N_XTRANON()     Start transaction
N_XTYPE()       Get Btrieve data type of specified field
N_XVARSTRU()    Define variant definition for current Btrieve file
N_XVERSION()    Returns Btrieve or RaSQL version information