Delphi didn't seem to have these predefined, so I had to calculate it myself. Since it can be pretty tough finding the right values (even with Google) I thought I'd just calculate them all and share the list with you. They are for use with the DeviceIoControl() API. I have found the code used to calculate the values on internet and only had to find the right parameter values, thus not too much credit should go to me.

This function being:

function CTL_CODE(DeviceType, FunctionNo, Method, Access: Integer): Integer;
begin
  Result := (DeviceType shl 16) or (Access shl 14) or (FunctionNo shl 2) or (Method);
end;

As for Method and Access, these are the values used for them:

  METHOD_BUFFERED          = 0;
  METHOD_NEITHER           = 3;
  FILE_ANY_ACCESS          = 0;
  FILE_READ_ACCESS         = 1;
  FILE_WRITE_ACCESS        = 2;

The list:

(I used $ instead of 0x because this list will probably be predefined in most C/C++ and ASM compilers and I used it for Delphi)

IOCTL_DISK_GET_DRIVE_GEOMETRY      = $0070000
IOCTL_DISK_GET_PARTITION_INFO      = $0074004
IOCTL_DISK_SET_PARTITION_INFO      = $007C008
IOCTL_DISK_GET_DRIVE_LAYOUT        = $007400C
IOCTL_DISK_SET_DRIVE_LAYOUT        = $007C010
IOCTL_DISK_VERIFY                  = $0070014
IOCTL_DISK_FORMAT_TRACKS           = $007C018
IOCTL_DISK_REASSIGN_BLOCKS         = $007C01C
IOCTL_DISK_PERFORMANCE             = $0070020
IOCTL_DISK_IS_WRITABLE             = $0070024
IOCTL_DISK_LOGGING                 = $0070028
IOCTL_DISK_FORMAT_TRACKS_EX        = $007C02C
IOCTL_DISK_HISTOGRAM_STRUCTURE     = $0070030
IOCTL_DISK_HISTOGRAM_DATA          = $0070034
IOCTL_DISK_HISTOGRAM_RESET         = $0070038
IOCTL_DISK_REQUEST_STRUCTURE       = $007003C
IOCTL_DISK_REQUEST_DATA            = $0070040
IOCTL_DISK_CONTROLLER_NUMBER       = $0070044
IOCTL_DISK_GET_PARTITION_INFO_EX   = $0070048
IOCTL_DISK_SET_PARTITION_INFO_EX   = $007C04C
IOCTL_DISK_GET_DRIVE_LAYOUT_EX     = $0070050
IOCTL_DISK_SET_DRIVE_LAYOUT_EX     = $007C054
IOCTL_DISK_CREATE_DISK             = $007C058
IOCTL_DISK_GET_LENGTH_INFO         = $007405C
SMART_GET_VERSION                  = $0074080
SMART_SEND_DRIVE_COMMAND           = $007C084
SMART_RCV_DRIVE_DATA               = $007C088
IOCTL_DISK_GET_DRIVE_GEOMETRY_EX   = $00700A0
IOCTL_DISK_UPDATE_DRIVE_SIZE       = $007C0C8
IOCTL_DISK_GROW_PARTITION          = $007C0D0
IOCTL_DISK_GET_CACHE_INFORMATION   = $00740D4
IOCTL_DISK_SET_CACHE_INFORMATION   = $007C0D8
IOCTL_DISK_GET_WRITE_CACHE_STATE   = $00740DC
IOCTL_DISK_DELETE_DRIVE_LAYOUT     = $007C100
IOCTL_DISK_UPDATE_PROPERTIES       = $0070140
IOCTL_DISK_FORMAT_DRIVE            = $007C3CC
IOCTL_DISK_SENSE_DEVICE            = $00703E0
IOCTL_DISK_INTERNAL_SET_VERIFY     = $0070403
IOCTL_DISK_INTERNAL_CLEAR_VERIFY   = $0070407
IOCTL_DISK_INTERNAL_SET_NOTIFY     = $0070408
IOCTL_DISK_CHECK_VERIFY            = $0074800
IOCTL_DISK_MEDIA_REMOVAL           = $0074804
IOCTL_DISK_EJECT_MEDIA             = $0074808
IOCTL_DISK_LOAD_MEDIA              = $007480C
IOCTL_DISK_RESERVE                 = $0074810
IOCTL_DISK_RELEASE                 = $0074814
IOCTL_DISK_FIND_NEW_DEVICES        = $0074818
IOCTL_DISK_GET_MEDIA_TYPES         = $0070C00

I hope this will helpful for somebody!

PS: If I forgot one or you are in need of another one, PM me or leave a message here!

Edited February 21, 201015 yr by Gushe

Hi

In last time coding i with Ioctl and i have a nice tool found

IoctlDecoder:
/>http://www.freewebs.com/four-f/Tools/IoctlDecoder.zip

And this is nice to decode the hexcode from disassembly a app

Greets,