static void Main(string[] args)
{
Byte[] data; // a variable to hold our desired data...
Win32Exception ex, ex2; //see using block below
int outputBufferSize = 4096000; //just some buffer ... way to big, but hey ...
var unmanagedOutputBuffer = Marshal.AllocHGlobal(outputBufferSize); // Marshal will give us an unmanaged buffer of desired size ... hopefully
RAW_READ_INFO ri = new RAW_READ_INFO {
DiskOffset = 0, SectorCount = 20, TrackMode = TRACK_MODE_TYPE.YellowMode2
}; // what do we want to read?
var ri_size = Marshal.SizeOf(ri); // since we are giving ri to an unmanaged function, we need to tell that function the size of ri
int bytesReturned = 0; // if everything works as expected, we will get something written in our unmanaged buffer ... here we can store how many bytes were written
using (var hDev = CreateFile(@"\\.\H:", EFileAccess.GenericRead, EFileShare.Read | EFileShare.Write, IntPtr.Zero, ECreationDisposition.OpenExisting, EFileAttributes.Normal, IntPtr.Zero))
{ // since we are working with a handle, we have to make sure we release it after we are done ... "using" does that for us
ex = new Win32Exception(); //will tell you if CreateFile worked
var b = DeviceIoControl(hDev, IOCTL_CDROM_RAW_READ, ref ri, ri_size, unmanagedOutputBuffer, outputBufferSize, ref bytesReturned, IntPtr.Zero); // the magic happens here
ex2 = new Win32Exception(); //will tell you if DeviceIoControl worked
}
if (bytesReturned > 0)
{
data = new byte[bytesReturned]; //this time, a managed buffer to hold our data
Marshal.Copy(unmanagedOutputBuffer, data, 0, bytesReturned); // copy from unmanaged buffer to managed buffer (from the land of dragons and monsters into the .net world)
}
Marshal.FreeHGlobal(unmanagedOutputBuffer); //release the unmanaged buffer
// if everything worked as expected you should now have the first 20 sectors of a ordinary CD-Rom (Yellow Book - Mode 2) in the data array ...
}
public extern static int DeviceIoControl(
SafeFileHandle hDevice,
uint dwIoControlCode,
[In] ref RAW_READ_INFO lpInBuffer,
int nInBufferSize,
IntPtr lpOutBuffer,
int nOutBufferSize,
ref int lpBytesReturned,
IntPtr lpOverlapped);
private static extern bool DeviceIoControl(
SafeFileHandle hDevice,
uint dwIoControlCode,
ref RAW_READ_INFO InBuffer, // with RAW_READ_INFO
int nInBufferSize,
IntPtr OutBuffer,
int nOutBufferSize,
ref int pBytesReturned,
IntPtr lpOverlapped);
public extern static int DeviceIoControl(IntPtr hDevice, uint IoControlCode,
[In] RAW_READ_INFO rri, uint InBufferSize,
[In, Out] byte[] OutBuffer, uint OutBufferSize,
ref uint BytesReturned,
IntPtr Overlapped);
