>>I believe the issue here has to do with the rendering mode inside of the control. Proper HTML5 content with the appropriate doc type headers will render without a border. But content that's not using IE Edge mode (ie. IE7 rendering) will render with the 3d frame.
>>
>>IOW, this is driven by the engine.
>>
>>Make sure the pages you're displaying are using HTML5 compliant header:
>>
>>
>><!DOCTYPE html>
>><html>
>><head>
>> <meta charset="utf-8" />
>> <meta http-equiv="X-UA-Compatible" content="IE=edge" />
>>
>>
>>This works for me to get borderless windows.
>>
>>For other browsers the DocType is no longer needed because the pre-presumption is HTML5 mode, but for IE it needs the hint otherwise it renders in Quirks mode which is what apparently brings up the crazy borders.
>>
>
>Thanks Rick, I think that will do best. Changing the registry is not as comfortable as we're talking about thousands of workstations and wan't to avoid any IT involvement.
Actually I think the setting is in the user's hive, so adding one more call to what's there already (the "go for latest version of IE" should be there). Just in case you run into the situation where you can't control the content, eg. when it's coming from a third party.
