Cannot call an activex control from within a .NET webbrowser control

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I built a nice ActiveX control using .net 4.6.1. When using it in a html page inIE11 no problem at all.

Then I used the same page using the WebBrowser control, and configuration problems appear.

I'm sure webbrowser controls is configurated from IE, isn't it?

Please, I need help.
Thank you.

What I have tried:

I've been looking for msdn info and the most similar thigs are regarding 'aestetic differences when rendering rounded boxes, etc'... That is not the problem here.

Posted 20-Feb-17 1:44am

Antonio Bejar

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Graeme_Grant 20-Feb-17 8:07am

You know that embedded objects, like ActiveX, are being/have been disabled/removed by most major web browsers?

Antonio Bejar 20-Feb-17 8:22am

I know, but still working on IE11 and, trust me, there's a lot of customers that don't what to hear about using another approach.

Of course I an't go for activeX on Edge or others but, if it still works for IE11, it's a must providing a solution. Here my desperation.

Dave Kreskowiak 20-Feb-17 8:10am

You do know that ActiveX controls are no longer supported in browsers, right?

Antonio Bejar 20-Feb-17 8:25am

In fact, I was solving it when realized than when using such a control in a windows form app made with .net 3.5, I realized it didn't work so..... Remember about that magic blue where no need to know about implementation, etc....?
Well, here, that glue seems to dude when inferfacing different .net releases.

Richard Deeming 20-Feb-17 11:37am

Unless you've changed the registry[^], the WebBrowser control will be stuck in IE7 mode.

Does your ActiveX control work in IE11 if you use the F12 developer tools to switch to IE7 mode?

Antonio Bejar 20-Feb-17 11:48am

I didn't know about emulating IE7 with dev tools. Thx.
Yes, it also works when in IE7 mode.

When in iE, no problem. When using webbrowser control in a .net project, loading the same html page, I get the message "object doesn't support this property or method". The control is made with .net 4.6.1 and the container winform is .net 3.5

Richard Deeming 20-Feb-17 11:54am

Have you set the ScriptErrorsSuppressed property to true? This blog post[^] suggests that you won't be able to create an instance of your ActiveX control unless you set that property to false.

Antonio Bejar 20-Feb-17 12:03pm

I placed two controls in the same window to compare: form.webbrowser (with scripterrorsupressed=true) and AxSHDocVx.AxWebBrowser(Silent=true)
Still none of them works, just a "object doesn't support this property or method" message

Has anything to do with the registrtion process???

Richard Deeming 20-Feb-17 12:05pm

That's the point - if you set the ScriptErrorsSuppressed property (or the Silent flag) to true, the blog post is saying that ActiveX controls won't work.

Try setting the property to false instead.

Antonio Bejar 20-Feb-17 12:13pm

Ah. Initialli both switches were false (I read that blog some days ago). In my previous post I changed both to true and the same again....

Richard Deeming 20-Feb-17 12:25pm

Have you checked your Group Policy settings? They can be configured differently for Internet Explorer and other processes.

Managing Browser Settings with Group Policy Tools[^]
Group Policies in Internet Explorer 9[^]

Antonio Bejar 20-Feb-17 12:38pm

wow. I'll check that but need a while to read.
Btw, maybe I'm mistaken but it seems like the pass from .net to com has some tricks, isn't it?
If one declares a com interface, register (doing that with regasm), that signature has to be seeeing from any com comsumer.... why not here???

I'll replay when reading the links you gave me. thx!

Antonio Bejar 20-Feb-17 13:15pm

btw, the control is not signed but don't think this gives different behaviors..... or Am I wrong???

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