Lazarus 1.8.4 FPC 3.0.4.
ActiveX issue when using WMIDephiCodeCreator.
Also found it in the old closed issues on a different version.

The code (WMI delphi code creator).

procedure GetWin32_ComputerSystemInfo;
const
WbemUser ='';
WbemPassword ='';
WbemComputer ='localhost';
wbemFlagForwardOnly = $00000020;
var
FSWbemLocator : OLEVariant;
FWMIService : OLEVariant;
FWbemObjectSet: OLEVariant;
FWbemObject : Variant;
oEnum : IEnumvariant;
sValue : string;
begin;
FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
FWMIService := FSWbemLocator.ConnectServer(WbemComputer, 'root\CIMV2', WbemUser, WbemPassword);
FWbemObjectSet:= FWMIService.ExecQuery('SELECT * FROM Win32_ComputerSystem','WQL',wbemFlagForwardOnly);
oEnum := IUnknown(FWbemObjectSet.NewEnum) as IEnumVariant;
while oEnum.Next(1, FWbemObject, nil) = 0 do
begin
sValue:= FWbemObject.Properties.Item('Model').Value;
Writeln(Format('Model %s',[sValue]));// String

Writeln('');
FWbemObject:=Unassigned;
end;
end;

Compiler log:

Free Pascal Compiler version 3.0.4 [2018/05/19] for x86_64
Copyright (c) 1993-2017 by Florian Klaempfl and others
Target OS: Win64 for x64
Compiling C:\FPC\FPC\test_delphi.pp
test_delphi.pp(47,39) Error: Call by var for arg no. 3 has to match exactly: Got
"Pointer" expected "LongWord"
test_delphi.pp(69,4) Fatal: There were 1 errors compiling module, stopping
Fatal: Compilation aborted