Resizing a Webbrowser control hosted by an Explorer Bar in IE

Answer 1

Typically, when a container hosting an OLE control is resized, it queries the embedded object for its IOleInPlaceObject interface, and uses the SetObjectRects() on that interface to tell the control its new size.

Answer 2

This 'answer' doesn't relate directly to the original question, but I came across this page while trying to find a solution for a very similar issue.

Whenever I moved the splitter about it would always ping back to the original position. Turns out that DESKBANDINFO mode flags are not particularly well named for vertical sidebars. I was using DBIMF_NORMAL when I should have been using DBIMF_VARIABLEHEIGHT.

Example code:

STDMETHODIMP CMyExplorerBar::GetBandInfo(DWORD dwBandID,
                                         DWORD dwViewMode,
                                         DESKBANDINFO* pdbi)
{
    if(pdbi)
    {
        m_dwBandID = dwBandID;
        m_dwViewMode = dwViewMode;

        if(pdbi->dwMask & DBIM_MINSIZE)
        {
            pdbi->ptMinSize.x = 30;
            pdbi->ptMinSize.y = 30;
        }

        if(pdbi->dwMask & DBIM_MAXSIZE)
        {
            pdbi->ptMaxSize.x = -1;
            pdbi->ptMaxSize.y = -1;
        }

        if(pdbi->dwMask & DBIM_INTEGRAL)
        {
            pdbi->ptIntegral.x = 1;
            pdbi->ptIntegral.y = 1;
        }

        if(pdbi->dwMask & DBIM_ACTUAL)
        {
            pdbi->ptActual.x = 500;
            pdbi->ptActual.y = 0;
        }

        if(pdbi->dwMask & DBIM_TITLE)
        {
            StringCchCopy(pdbi->wszTitle, 256, L"My Sidebar");
        }

        if(pdbi->dwMask & DBIM_MODEFLAGS)
        {
            pdbi->dwModeFlags = DBIMF_VARIABLEHEIGHT;
        }

        if(pdbi->dwMask & DBIM_BKCOLOR)
        {
            pdbi->dwMask &= ~DBIM_BKCOLOR;
        }

        return S_OK;
    }

    return E_INVALIDARG;
}