USAGE
   signed int scdncreate(
           signed char *filename,
           signed int keytype,
           signed char *keyexpr,
           signed int keylen );

PROTOTYPE IN
   sc_base.h

DESCRIPTION
   scdncreate creates a dBASE index file. keyexpr will be translated
   to all upper case when the index file is created.

   If keytype is SC_CKEY then keyexpr must be an ASCIIZ string
   consisting of one or more field names from the data record. All fields
   included in the expression must be of type 'c' or be translated into type
   'c'. No check is made to verify this. keyexpr cannot be longer that
   220 characters. keylen cannot exceed 100.

   If keytype is SC_DKEY or SC_NKEY, then keyexpr should
   consist of only one data field. keylen will automatically be set to
   8 (numeric and date keys are stored as doubles). For both date and numeric
   keys keytype will be forced to 'n'.

   When unique keys are required, OR SC_UNIQUE with keytype.

NOTES
   scdncreate will create a new index file even if one had already
   existed.

   keyexpr is used by dBASE. keyexpr is NOT checked for validity
   during the file creation process. Currently only the scdnkmake function
   uses keyexpr.

EXAMPLE
   #include <sc_base.h>

   void main()
   {
     scdinit(20,0);
     scdncreate("TOCDATE.NDX",'c',"dtoc(date) + time",16);
     scdterm();
   }