#pragma comment(linker,"/SECTION:SS,RWS")    LINK选项，创建数据段

2。内存映射文件

HANDLE  hFile = CreateFile("E:\\aa.txt",GENERIC_ALL,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
HANDLE hFileMap = CreateFileMapping(hFile,NULL,PAGE_READWRITE,0,100,NULL);
PBYTE pbFile = (PBYTE)MapViewOfFile(hFileMap,FILE_MAP_ALL_ACCESS,0,0,0);
pbFile[0]=98;
pbFile[1] = 97;
UnmapViewOfFile(pbFile);
CloseHandle(hFileMap);
CloseHandle(hFile);