诡异加猥琐哦先记录一下，以备后用

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>

BOOL  GetMapAddr(char* lpFileName, DWORD& dwAddr)
{
  HANDLE hFile    = INVALID_HANDLE_VALUE;
  HANDLE hMap     = INVALID_HANDLE_VALUE;
  BOOL   bRet     = FALSE;

  hFile = CreateFile(lpFileName, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE,
    NULL,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  
  if (hFile == INVALID_HANDLE_VALUE) 
    goto Exit0;
  
  hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
  
  if (hMap == NULL)
    goto Exit0;
  
  dwAddr = (DWORD)MapViewOfFile(hMap, FILE_MAP_WRITE, 0, 0, 0);    
  
  if (dwAddr == NULL) 
    goto Exit0;
  
  bRet = TRUE;

Exit0:

  if (hMap != INVALID_HANDLE_VALUE)
  {
    CloseHandle(hMap);
  }

  if (hFile != INVALID_HANDLE_VALUE)
  {
    CloseHandle(hFile);
  }

  return bRet;
}

int main(int argc, char* argv[])
{
    DWORD dwAddr = 0;
  if (GetMapAddr("a.txt", dwAddr))
  {
    strcat((char*)dwAddr, "a.txt");
    int nLen = strlen((char*)dwAddr);
    FlushViewOfFile((LPVOID)dwAddr, nLen);

    printf("%s\r\n", (char*)dwAddr);

    if (!UnmapViewOfFile((LPVOID)dwAddr))
    {
      printf("UnmapViewOfFile error!\r\n");
    }

  }

  system("pause");

    return 0;
}