C / C++ / MFC

HANDLE hDevice;

	hDevice = CreateFile("\\.\PhysicalDrive0"    // drive 
                              0,                    // no access to the drive
                              FILE_SHARE_READ |    // share mode
                              FILE_SHARE_WRITE, 
                              NULL,              // default security attributes
                              OPEN_EXISTING,    // disposition
                              0,               // file attributes
                              NULL);          // do not copy file attributes



	PARTITION_INFORMATION_EX obj;
	DWORD cb;
	

	BOOL iu = DeviceIoControl(hDevice,                             // handle to a partition
				  IOCTL_DISK_GET_PARTITION_INFO_EX,   // dwIoControlCode
				  NULL,                              // lpInBuffer
				  0,                                // nInBufferSize
				  &obj,			           // output buffer
				  sizeof(obj),                    // size of output buffer
				  &cb,                           // number of bytes returned
				  NULL                          // OVERLAPPED structure
				 );
	if(iu == 0)
	{
		DWORD err = GetLastError();
		CString str;
		str.Format("%d",err);
		AfxMessageBox(str);
	}
	CloseHandle(hDevice);