Блокировка/Разблокировка CD-ROM

Code:

// ©Drkb v.3

//заблокировать

void CMFcDlg::OnBnClickedButton1()

{

HANDLE hDevice = CreateFile ("\\\\.\\E:",

GENERIC_READ,

FILE_SHARE_READ | FILE_SHARE_WRITE,

NULL,

OPEN_EXISTING,

NULL,

NULL);

DWORD dwBytesReturned = 0;

PREVENT_MEDIA_REMOVAL pmr = {TRUE};

if(!DeviceIoControl (hDevice, IOCTL_STORAGE_MEDIA_REMOVAL, &pmr, sizeof(pmr), NULL, 0, &dwBytesReturned, NULL)) AfxMessageBox ("Door can\'t be locked");

CloseHandle (hDevice);

}

//разблокировать

void CMFcDlg::OnBnClickedButton2()

{

HANDLE hDevice = CreateFile ("\\\\.\\E:",

GENERIC_READ,

FILE_SHARE_READ | FILE_SHARE_WRITE,

NULL,

OPEN_EXISTING,

NULL,

NULL);

DWORD dwBytesReturned = 0;

PREVENT_MEDIA_REMOVAL pmr = {FALSE};

if(!DeviceIoControl (hDevice, IOCTL_STORAGE_MEDIA_REMOVAL, &pmr, sizeof(pmr), NULL, 0, &dwBytesReturned, NULL)) AfxMessageBox ("Door can\'t be unlocked");

CloseHandle (hDevice);

}