SET LIBRARY TO DBRECCNT
DO CreateTest
? DBRECCOUNT()   && call API routine
? RECCOUNT()   && call built-in Visual FoxPro Function

PROCEDURE CreateTest
   CREATE TABLE test (ABC C(20))
   APPEND BLANK
   REPLACE ABC WITH "This is record 1"
   APPEND BLANK
   REPLACE ABC WITH "This is record 2"
   APPEND BLANK
   REPLACE ABC WITH "This is record 3"
   APPEND BLANK
   REPLACE ABC WITH "This is record 4"
   GO TOP
RETURN

#include <pro_ext.h>

FAR Example(ParamBlk FAR *parm)
{
   _RetInt(_DBRecCount(-1), 10);
}

FoxInfo myFoxInfo[] = {
   {"DBRECCOUNT", (FPFI) Example, 0, ""},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};