Проекция файла - C++

#include <stdio.h>
#include <process.h>
#include <windows.h>
 
int main(void)
{
  HANDLE      hMapFile, hFile, event;
  char        *map_data;
  int i;
 
  hFile = CreateFile("Mydata.dat", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ,
                     NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 
  hMapFile = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0,   "MapLab8");
  if (hMapFile != NULL && GetLastError() == ERROR_ALREADY_EXISTS) {
    printf("FileMapping handle %p exist!", hMapFile);
    CloseHandle(hMapFile);
    exit(1);
  }
  if(hMapFile == NULL) {
    printf("FileMapping handle not created!");
    exit(1);
  }
 
  event = CreateEvent(NULL, FALSE, FALSE, "MyEvent");
  if (event == NULL){
      printf("CreateEvent Failed!");
      exit(1);
  }
  WaitForSingleObject(event, INFINITE);
 
  map_data = (char *) MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 8*1024*1024);
  if(map_data == NULL) {
    printf("Can't lock mapzone!");
    exit(1);
  }
  for (i = 0; i < 8*1024*1024; i++) printf("%c", map_data[i]);
  
  UnmapViewOfFile(map_data);
  CloseHandle(hMapFile);
  CloseHandle(hFile); CloseHandle(event);
  return 0;
}

#include <stdio.h>
#include <process.h>
#include <windows.h>
 
int main(void)
{
  HANDLE      hMap, event;
  char        *map_data;
  
  hMap = OpenFileMapping (FILE_MAP_ALL_ACCESS, FALSE, "MapLab8");
  if (hMap == NULL){
      printf ("Proection not exist!");
      exit(1);
  }
 
  event = OpenEvent(EVENT_ALL_ACCESS, FALSE, "MyEvent");
  if (event == NULL){
      printf("OpenEvent Failed!");
      exit(1);
  }
 
  map_data = (char*) MapViewOfFile(hMap, FILE_MAP_ALL_ACCESS, 0, 0, 8*1024*1024); //сюда нужно написать
  if (map_data == NULL){
     printf("Can't lock mapzone!");
     exit(1);
  }
  strcpy (map_data, "Hie! It's me - slave.c\n");
  
  SetEvent(event);
  UnmapViewOfFile(map_data);
  CloseHandle(hMap); CloseHandle(event);
  return 0;
}