Use an ActiveX COM DLL within Delphi without .ocx?

Posted on 2004-11-01
Last Modified: 2010-04-05
I have a component which is described as an ActiveX COM DLL. I would like to use the component with Delphi 7 to develop applications.
When I have used ActiveX components in the past, there has been a .ocx ActiveX control file which I have used with Component > Import ActiveX > Add to be able to see the component in a palette and add it to my application.
There is no mention of a .ocx file with this release anywhere in the documentation, nor can I find on the www a .ocx file or any guidance which would enable me to get to work. Can someone please fill in the knowledge gap and let me know either how to use this .dll or why it isn't possible?
Question by:shallimus
    LVL 6

    Expert Comment

    if this DLL includes type library, you can select
    components -> import activex control -> add -> select your DLL

    after your TLB will be added to TLB list, you will click "create unit" button,
    as a result interface uniit will be created

    if you will click "install" button, your activex will be installed in component palette

    Author Comment

    Thanks for your reply vadim_ti.
    I tried adding the DLL, and received no error, but do not see the component in the list. I have looked through several times; it really isn't there. There is a .tlb file in the directory with the DLL.
    Is there something I'm doing wrong, or not doing?

    Author Comment

    Or, another thought occurs: is there some way to manually add the TLB to Delphi's list, since it doesn't seem to add in the way it is supposed to?
    LVL 6

    Accepted Solution

    You can use TLIBIMP utility

    TLIBIMP yourLibrary.TLB

    2 files will be created:


    it will be delphi component and you can install it in regular way

    LVL 22

    Expert Comment


      ActiveX COM Dll is just Com Dll, don't use Import ActiveX menu to add reference to it, instead use Import Type Library from project menu


    Author Comment

    Thanks vadim. This was great and exactly what I needed. The component is now working in my IDE :)

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