内存映射文件

#include <Windows.h>

int _tmain(int argc, _TCHAR* argv[])
{
    TCHAR filePath[] = TEXT("F:\\sample.txt");
    HANDLE hFile = CreateFile(filePath, GENERIC_READ | GENERIC_WRITE, 
                        0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    HANDLE hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
    PBYTE pbFile = (PBYTE)MapViewOfFile(hFileMapping, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
    //READ
    BYTE bSomeByte = pbFile[0];
    //WRITE
    pbFile[0] = 'A';
    FlushViewOfFile(pbFile, 1);
    UnmapViewOfFile(pbFile);
    CloseHandle(hFileMapping);
    CloseHandle(hFile);
    return 0;
}