SendMessage() with ActiveX only works once?

Hi all,

I’m having trouble with the ActiveX’s SendMessage() function (for communication from a web page to an embedded Unity player). As I said in the title, it works as intended the first time I call it, then seems to be ignored by the Unity player.

Maybe there’s an issue with the ActiveX initialization, or the first message somehow blocks the player and since I’m not in the editor I can’t see the error. Is there a way to debug this situation, to simulate an external application?

Note: I’m actually embedding the ActiveX in a WinForm, not a web page. I know it’s not officially supported, but I got it to work apart from the SendMessage() issue, and that’s something that’s also relevant to the normal way of using the ActiveX.

Do you have any idea of what might be happening?
Thanks.

Found the solution - I needed to allow the player to run in the background.

To whoever’s interested: this also causes a huge performance drop in this specific situation, the solution is to run Unity in a new thread.

Cheers.

(edit: for a more detailed guide on how I integrated Unity with WinForms and WPF, which I did to develop on MS Surface, you can take a look here: Developing for Surface with Unity3D, using WinForms and WPF )