CreateFile and ReadFile

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#11195

From: ray
Date: Thu, 19 Feb 2004 16:42

21 lines
1612 bytes

Hi,
i can use the following code to read a drive, but it just allows me to read
512*n bytes (sector size) every time.
how can i read 1 byte every time?

//=================================
char drivename[]="\\\\.\\c:";
  HANDLE hDevice = CreateFile(drivename,
        GENERIC_READ,   FILE_SHARE_READ,
        NULL, OPEN_EXISTING,   0,      NULL    );
    SetFilePointer (hDevice, addr, NULL, FILE_BEGIN);

    char* buffer = (char*)malloc(size);
    ReadFile(hDevice, buffer, size, &bytesread, NULL);
//=================================

i change the size to 1 or lest than 512, it don't work.



.

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Subject: CreateFile and ReadFile
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