{
 This code takes advantage of the undocumented NtQuerySystemInformation
 API to obtain a list of loaded drivers under Windows NT.
}
const
 DRIVER_INFORMATION = 11;
type
 TPDWord = ^DWORD;
 TDriverInfo = packed record
  Address: Pointer;
  Unknown1: DWORD;
  Unknown2: DWORD;
  EntryIndex: DWORD;
  Unknown4: DWORD;
  Name: array [0..MAX_PATH + 3] of Char;
 end;
var
 NtQuerySystemInformation: function (infoClass: DWORD;
 buffer: Pointer;
 bufSize: DWORD;
 returnSize: TPDword): DWORD; stdcall = nil;
 function GetDriverInfo: string;
 var
  temp, Index, numBytes, numEntries: DWORD;
  buf: TPDword;
  driverInfo: ^TDriverInfo;
 begin
  if @NtQuerySystemInformation = nil then
  NtQuerySystemInformation := GetProcAddress(GetModuleHandle('ntdll.dll'),
  'NtQuerySystemInformation');
  // Obtain required buffer size
  NtQuerySystemInformation(DRIVER_INFORMATION, @temp, 0, @numBytes);
  // Allocate buffer
  buf := AllocMem(numBytes * 2);
  NtQuerySystemInformation(DRIVER_INFORMATION, buf, numBytes * 2, @numBytes);
  numEntries := buf^;
  driverInfo := Pointer(DWORD(buf) + 12);
  Result := '';
  for Index := 1 to numEntries do
  begin
  Result := Result + #$D#$A + 'Address: $' + IntToHex(DWORD(driverInfo^.Address), 8) +
  'Name: "' + (driverInfo^.Name) + '"';
  Inc(driverInfo);
  end;
  Delete(Result, 1, 2);
  FreeMem(buf);
 end;
 procedure TForm1.Button1Click(Sender: TObject);
 begin
  ListBox1.Items.Add(GetDriverInfo)
 end;

 // Thanks to Madshi for helping me translate from C++ Code
 // Original Code (C++) :
 // NtDriverList v1.0
 // Copyright 1998, 1999 Yariv Kaplan
 // WWW.INTERNALS.COM