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procedure TForm1.Button1Click(Sender: TObject);
const
  WbemUser            ='';
  WbemPassword        ='';
  WbemComputer        ='localhost';
  wbemFlagForwardOnly = $00000020;
var
  FSWbemLocator : OLEVariant;
  FWMIService   : OLEVariant;
  FWbemObjectSet: OLEVariant;
  FWbemObject   : OLEVariant;
  oEnum         : IEnumvariant;
  iValue        : LongWord;
  I : Integer;
  Data : array of WORD;
  params: OleVariant;
begin;
    MM('Win32_DiskDrive');
    MM('---------------');
  FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
  FWMIService   := FSWbemLocator.ConnectServer(WbemComputer, 'root\CIMV2', WbemUser, WbemPassword);
  FWbemObjectSet:= FWMIService.ExecQuery('SELECT Model,Capabilities,CapabilityDescriptions,Name FROM
Win32_DiskDrive','WQL',wbemFlagForwardOnly);
  oEnum         := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;
  while oEnum.Next(1, FWbemObject, iValue) = 0 do
  begin
      if not VarIsNull(FWbemObject.Capabilities) then
      begin
        Data := FWbemObject.Capabilities;
        for I:= VarArrayLowBound(data,1) to VarArrayHighBound(data,1) do
          MM('Capabilities: '+IntToStr(Data[I]));// Array of WORD /Uint16
      end;

      if not VarIsNull(FWbemObject.CapabilityDescriptions) then
      begin
        Params := FWbemObject.CapabilityDescriptions;
        for I:= VarArrayLowBound(Params,1) to VarArrayHighBound(Params,1) do
          MM('CapabilityDescriptions: '+ VarToStr(Params[I]));// Array of VarToStr
      end;

    MM(Format('Model                %s',[VarToStr(FWbemObject.Model)]));// String
    MM(Format('Name                 %s',[VarToStr(FWbemObject.Name)]));// String
    MM('-------------------------------------------------------------------');
    FWbemObject:=Unassigned;
  end;
end;