CDHtmlDialog crash while updating frequently




/*
when using CDHtmlDialog to navigate a page frequently
and changing content and refresh it will crash in
ieframe.dll or mshtml.dll.

To avoid crash check browser busy state
before navigating a file in CDHtmlDialog

*/

//sample code to navigating html file

void CMYDHtmlDialog::NavigateFile()
{
    CString csFilePath;
    csFilePath = "c:\\sample.html";

    //wait for 1 second if not loaded or in busy state
    if( FALSE == WaitTillLoaded (1000) )
         return;

    Navigate(csFilePath, NULL, NULL);
  
}


//sample code to  wait till page lode in browser
BOOL CMYDHtmlDialog::WaitTillLoaded (int nTimeout)
{
    READYSTATE result;
    DWORD nFirstTick = GetTickCount ();

    do
    {
        m_pBrowserApp->get_ReadyState (&result);
      
        if (result != READYSTATE_COMPLETE)
            Sleep (50);
      
        if (nTimeout > 0)
        {
            if ((GetTickCount () - nFirstTick) > nTimeout)
                break;
        }
    } while (result != READYSTATE_COMPLETE);

    if (result == READYSTATE_COMPLETE)
        return TRUE;
    else
        return FALSE;
}