Html control embedded

From:

mosfet <john.doe@anonymous.org>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 10 Jan 2008 10:45:09 +0100

Message-ID:

<4785e924$0$14854$426a34cc@news.free.fr>

Hi,

I am developping with MFC on Windows Mobile platforms and I have some
questions about embedding a HTML control inside a control.

Here is the sample code I wrote :

BEGIN_MESSAGE_MAP(CHtmlWnd, CWnd)
    ON_WM_WINDOWPOSCHANGED()
END_MESSAGE_MAP()

int CHtmlWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CWnd::OnCreate(lpCreateStruct) != 0)
    {
        return -1;
    }

    Init();

    return 0;
}

void CHtmlWnd::PreSubclassWindow()
{
    Init();

}

void CHtmlWnd::Init()
{
    if (m_bInited == true)
        return;

    if (m_HtmlViewInstance == 0) {
        m_HtmlViewInstance = ::LoadLibrary(L"htmlview.dll");
    }

    VERIFY( InitHTMLControl( AfxGetInstanceHandle() ));

    DWORD dwStyle = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_BORDER;
    RECT rect;
    GetClientRect(&rect);
    m_hwndHtml = ::CreateWindow( DISPLAYCLASS,
                                  NULL,
                                  dwStyle,
                                  rect.left,
                                  rect.top,
                                  rect.right,
                                  rect.bottom,
                                  m_hWnd,
                                  0,
                                  m_HtmlViewInstance,
                                  NULL);

    if ((m_hwndHtml != NULL) && (m_HtmlViewInstance != NULL))
    {

        ATLTRACE( _T("Host Control Handle : m_hWnd = 0x%x\n"), m_hWnd );
        ATLTRACE( _T("Html Control Handle : m_hwndHtml = 0x%x\n"), m_hwndHtml );

        ::SetWindowLong(m_hwndHtml, GWL_ID, 12321);
        ::SetFocus (m_hwndHtml);
        ::SendMessage(m_hwndHtml, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)_T(""));
        m_bInited = true;
    }

}

void CHtmlWnd::DeInit()
{
    if (m_hwndHtml != NULL)
    {
        ::DestroyWindow(m_hwndHtml);
        m_hwndHtml = NULL;
    }

    if (m_HtmlViewInstance != NULL)
    {
        ::FreeLibrary( m_HtmlViewInstance );
        m_HtmlViewInstance = NULL;
    }

    m_bInited = false;
}

Actually I have declared a control deriving from CWnd and inside the
OnCreate I am loading the DLL htmlview.dll and I call its function
InitHTMLControl.
After I create a HTML who will receive HTML messages.

The problem with this is I get two windows handle for this control and
sometimes when my application is loading and there is a heavy cpu load I
see that the HTML control is not painted.

Would it be possible to declare a CWnd control with only the HTML
control as main window ?