USAGE
   signed int scdcexpr(
           signed int handle,
           signed char *keyexpr );

PROTOTYPE IN
   sc_base.h

DESCRIPTION
   scdcexpr gets the index key expression and returns it as an ASCIIZ
   string into a user supplied buffer keyexpr. The user must ensure that
   the buffer is large enough (the key expression length can be determined
   via a call to scdcinfo) to hold the entire key expression.

NOTES
   A NULL byte will be appended to the end of the expression string returned.

EXAMPLE
   #include <stdio.h>
   #include <softc.h>
   #include <sc_base.h>

   void main()
   {
     int ntx;
     char buffer[512];

     scdinit(20,0);
     if (scdcopenx(&ntx, "TOCNAME.NTX", SC_BUFFER) == SC_SUCCESS) {
       scdcexpr(ntx,buffer);
       printf("key expression = %s",buffer);
       scdcclose(ntx);
     }
     scdterm();
   }