[Lazarus] ActiveX, TOLEControl

Dennis dec12 at avidsoft.com.hk
Wed Oct 19 18:07:35 CEST 2016

LacaK via Lazarus wrote:
>>> Hi *,
>>> I need help with OCX component (not visual I guess), which I need 
>>> use in Lazarus application (to control another application, which 
>>> supplies this OCX control).
>>> I have imported type library using importtl.exe (new unit was 
>>> created successfully)
>>> Then in program I have created instance:
>>>   v := CreateOleObject('SCAPS.ScSamlightClientCtrl');
>>> or
>>>   intf := CreateComObject(CLASS_ScSamlightClientCtrl) as 
>>> _DSamlight_client_ctrl_ocx;
>> What is the type of your V or intf  variable?
> V: OLEVariant;
> intf: _DSamlight_client_ctrl_ocx;
>> I am wild guessing maybe they are not proper referenced type so the 
>> object is created and then immediately freed.
> There is something strange behind scene. I have tried various methods:
I remember in Delphi, I sometimes have to call CoInitialize and 
Not sure if FPC has to do the same.
Have you tried that?


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