Closing form with WebBrowser control causes app to close

[moondaddy]

I have a vb.net 1.1 winforms app and am using a WebBrowser control
(AxSHDocVw.AxWebBrowser) on it. When I close the form the entire
application closes. This behavior didn't happen until I added the
WebBrowser control. Actually, the WebBrowser (WB) control is on a User
Control nested on another user control like this:

Form1
Main User Control (an open a number of different user controls depending
on the function we want to perform)
Control with WB.

In the dispose event of the Main User Control I set the reference to ucWB
to nothing hoping this would help, but it made no difference.

Can someone explain what's happening here and how to resolve it?

Thanks.

 

[Tom Krueger [MSFT]]

First off, is the form that you are closing the form that contains the
Main(). In other words is it the entry point for the application. I know
you said the behavior wasn't happening before adding the Web Browser
control, however, I just want to make sure.

The only thing that pops into my head is that there is some exception
occuring. Does the process actually end (use Task Manager to find out)

As far as setting the object reference to null, that won't kick off the
garbage collection. You will want to try calling Dispose on the browser
control first. However, I don't think this will help. Have you tried
making a small sample application with the same structure. What if you
don't use the user control and just put the web browser control on the form?

Post more info and I will try to help.

Best of luck,

--
Tom Krueger

Smart Client DevCenter - http://msdn.microsoft.com/smartclient/
Mobile DevCenter - http://msdn.microsoft.com/mobility

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