No theming on buttons when embedding IE9

Question

I'm using the IWebBrowser2 interface to IE9 in a standard Win32 app. Pages with controls like buttons are rendered without theming, so look like something from the Windows 2000 era. The identical page displays correctly using the stand-alone IE9. All pages have

<meta http-equiv="X-UA-Compatible" content="IE=9"/>

in the header

Any thoughts?

Answer 1

You must implement IDocHostUIHandler, then in the method GetHostInfo append the DOCHOSTUIFLAG_THEME to the dwFlags:

STDMETHODIMP GetHostInfo(DOCHOSTUIINFO *pInfo)
{
    pInfo->cbSize = sizeof(DOCHOSTUIINFO);
    pInfo->dwFlags = DOCHOSTUIFLAG_NO3DBORDER|DOCHOSTUIFLAG_DIALOG|DOCHOSTUIFLAG_THEME;
    pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT;
    return S_OK;
}