也就是在CreateFile的时候打开文件名指定:  “//./Device”就可以了.

因为代码比较短, 所以我不做注释, 相信大家看代码就能明白意思了.

另外这里读写的都是软盘A盘第0扇区, 如果想读写其他的扇区, 那么可以使用API SetFilePointer.

读扇区的方法(下面的代码演示从A盘的第0扇区读出数据, 写入到文件BOOT.BIN中):

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

void main(){    HANDLE hFile;    hFile = CreateFile(".//A:",                       GENERIC_READ,                       FILE_SHARE_READ,                       NULL,                       OPEN_EXISTING,                       0,                        NULL);    assert(hFile && "CreateFile failed!");

    PBYTE pBuffer = (PBYTE)malloc(512);    assert(pBuffer && "Allocate memory failed!");    DWORD dwLen;    ReadFile(hFile, pBuffer, 512, &dwLen, NULL);       FILE * fp;    fp = fopen("boot.bin", "wb");    assert(fp && "Open file failed!");    fwrite(pBuffer, 512, 1, fp);    fclose(fp);

    CloseHandle(hFile);

    free(pBuffer);}

那么相应的, 写扇区的方法的就是这样的咯(以下代码演示从BOOT.BIN中读出数据写入到A盘第0扇区):

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

void main(){    HANDLE hFile;    hFile = CreateFile(".//A:",                       GENERIC_WRITE,                       FILE_SHARE_WRITE,                       NULL,                       OPEN_EXISTING,                       0,                        NULL);    assert(hFile && "CreateFile failed!");

    PBYTE pBuffer = (PBYTE)malloc(512);    assert(pBuffer && "Allocate memory failed!");            FILE * fp;    fp = fopen("boot.bin", "rb");    assert(fp && "Open file failed!");    fread(pBuffer, 512, 1, fp);    fclose(fp);        DWORD dwLen;    WriteFile(hFile, pBuffer, 512, &dwLen, NULL);

    CloseHandle(hFile);

    free(pBuffer);}