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Editorial Team
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Asked: 2026-05-23T03:07:05+00:00

I am creating an ActiveX control using ATL and trying to expose a property

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I am creating an ActiveX control using ATL and trying to expose a property taking a Boolean value. I implemented it as below:

STDMETHOD(get_Visible)(VARIANT_BOOL *pVal);
STDMETHOD(put_Visible)(VARIANT_BOOL newVal);

In the JavaScript function, I call this by the following code:

MyAxCtl.Visible = true;
//MyAxCtl.Visible = "true";
//MyAxCtl.Visible = "TRUE";
//MyAxCtl.Visible = "VARIANT_TRUE";
//MyAxCtl.Visible = -1;
//MyAxCtl.Visible = "-1";

However, none of them works. So, my question is how to expose a Boolean value from ATL ActiveX control to JavaScript.

Moreover, anyone can tells me where can I find any document about communication between ATL types can JavaScript types? I want to find a list of ATL types that can be exposed to JavaScript.

Many thanks,
Shupining

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1 Answer

  1. Editorial Team

    From the code you provider the STDMETHOD’s are correct and the proper JavaScript call for a Boolean is to set it to true.

    While I don’t see a case issue with the code you posted, make sure its “Visible” not “visisble”.

    When you debug is the ActiveX call being entered?

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