code:

..
#include <afxdb.h>
..

void CreateTable()
{
  CDatabase db;
  CString query="CREATE TABLE A (id NUMBER)";
  
  db.OpenEx("DSN=OraTest", CDatabase::noOdbcDialog);
  db.ExecuteSQL(query); 
  db.Close;

}

code:
#include <iostream>
using namespace std;

#define OTL_ORA9I // Compile OTL 4.0/OCI9i
#include <otlv4.h> // include the OTL 4.0 header file

otl_connect db; // connect object


int main()
{
 otl_connect::otl_initialize(); // initialize OCI environment
 try{

  db.rlogon("scott/tiger"); // connect to Oracle

  otl_cursor::direct_exec
   (
    db,
    "create table a (a number)"
    );  // create table

 }

 catch(otl_exception& p){ // intercept OTL exceptions
  cerr<<p.msg<<endl; // print out error message
  cerr<<p.stm_text<<endl; // print out SQL that caused the error
 }

 db.logoff(); // disconnect from Oracle

 return 0;

}