Embedded Web Browser COMException

[Roy Muller]

Has anyone seen this behaviour before? I put Internet Exporer in a UserControl derived class and added this control to a form. When the form initializes at startup I get the following exception:

A first chance exception of type 'System.Runtime.InteropServices.COMException' occurred in system.windows.forms.dll

Additional information: Unknown error

The IE activeX control was added to my VStudio Toolbox via "Customise toolbox...". I selected \winnt\system32\shdocvw.dll. The version of this DLL is 6.0.2716.1500, last modified 4/15/2002, file size 1,336,320 bytes.

I can delete this browser from my user control, re-compile, and my app runs. I add it back, and this error occurs again on startup. This exception is thrown in my user control's InitializeComponent() method on the following line:

((System.ComponentModel.ISupportInitialize)(this.axWebBrowser1)).EndInit();

I created a smaller stand-alone app with similar UI components and it runs fine :-( Has anyone else experienced this?

-Roy

[Administrator]

Roy,

I have seen this before. But don't have any resolution for it. I remember that if you just remove the BeginInit and EndInit the app should work fine. Don't know if there are other issues when you do this.

-Praveen

[Keith Lubell]

Oh yes I have seen this. It is very annoying because, on a little test app. I do not see the problem. Then, in my big memory hungry app, I see the problem. I tried moving the forms that use it to a DLL, but to no avail. I finally put catch's around the failing statements. Seem to work, but I am not happy. I assume it is timing and memory related.

> Has anyone seen this behaviour before? I put Internet Exporer in a UserControl derived class and added this control to a form. When the form initializes at startup I get the following exception:
>
> A first chance exception of type 'System.Runtime.InteropServices.COMException' occurred in system.windows.forms.dll
>
> Additional information: Unknown error
>
> The IE activeX control was added to my VStudio Toolbox via "Customise toolbox...". I selected \winnt\system32\shdocvw.dll. The version of this DLL is 6.0.2716.1500, last modified 4/15/2002, file size 1,336,320 bytes.
>
> I can delete this browser from my user control, re-compile, and my app runs. I add it back, and this error occurs again on startup. This exception is thrown in my user control's InitializeComponent() method on the following line:
>
> ((System.ComponentModel.ISupportInitialize)(this.axWebBrowser1)).EndInit();
>
> I created a smaller stand-alone app with similar UI components and it runs fine :-( Has anyone else experienced this?
>
> -Roy