最近在SDK下使用WebBrowser遇到了个问题

最近在SDK下使用WebBrowser遇到了个问题，就是VK_TAB加速健，经后来分析，其实Ctrl+C等操作也是不行的，只不过已经事先在框架中执行了ExecWeb操作。

一开始，我还以为是MFC的CHtmlView对WebBrowser的包装过程中也象我处理Ctrl+C处理好了。因此，从早上到今晚的12点，我都试图使用这种方法来解决。就是在DocumetComplete后得到所有的Input link和textarea以及frame，然后实现SetFocusToNext和SetFocusToPrev.等函数。

//////////////////////////
BOOL CHtmlView::SetFocusToNext(LPDISPATCH pHtmlDocument)
{
BOOL bFocus=FALSE;
BOOL bFassCurFocus=FALSE;
IHTMLDocument2 *pDoc=NULL;
pHtmlDocument->QueryInterface(IID_IHTMLDocument2,(void**)&pDoc);
if(pDoc)
{
   IHTMLElementCollection* pColl = NULL;
   //得到所有元素
   if(SUCCEEDED(pDoc->get_all(&pColl)))
   {
    long   nNumElements;  
    if(SUCCEEDED(pColl->get_length(&nNumElements)))
    {
     if(nNumElements)
     {
      IHTMLElement* pActiveElement=NULL;
      if(SUCCEEDED(pDoc->get_activeElement(&pActiveElement)))
      {
       IHTMLFrameBase2* pFrame=NULL;
       if(SUCCEEDED(pActiveElement->QueryInterface(IID_IHTMLFrameBase2,(void**)&pFrame)))
       {
        if(pFrame)
        {
         IHTMLWindow2 *pWin;
         if(SUCCEEDED(pFrame->get_contentWindow(&pWin)))
         {
          if(pWin)
          {
           IHTMLDocument2 *pDoc2=NULL;
           if(SUCCEEDED(pWin->get_document(&pDoc2)))
           {
            if(pDoc2)
            {
             SetFocusToFirst(pDoc2);
             pDoc2->Release();
            }
           }
           pWin->Release();
          }
         }
         pFrame->Release();
        }
       }
       //这里已获得activeElement http://www.wzszf.com/
       long lActSrcIndex;
       pActiveElement->get_sourceIndex(&lActSrcIndex);
       for(long i = 0;i< nNumElements;i++)  
       {
        VARIANT varName;
        varName.vt=VT_UINT;
        varName.lVal   =   i;
        VARIANT varIndex;
        LPDISPATCH lpElementDisp=NULL;
        pColl->item(varName,varIndex,&lpElementDisp);
        {
         if(bFassCurFocus)//过了焦点，出现可焦则焦
         {
          IHTMLElement2* pElement2=NULL;   
          if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLElement2,(void**)&pElement2)))
          {
           IHTMLInputElement2*pInput=NULL;
           IHTMLAnchorElement2* pAnchor=NULL;
           IHTMLTextAreaElement* pTextArea=NULL;
           IHTMLFrameBase2* pFrame=NULL;
           if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLInputElement2,(void**)&pInput))
            ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLAnchorElement2,(void**)&pAnchor))
            ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLTextAreaElement,(void**)&pTextArea))
            ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLFrameBase2,(void**)&pFrame)))
           {
            if(pInput||pAnchor||pTextArea||pFrame)
            {

             if(SUCCEEDED(pElement2->focus()))
              bFocus=TRUE;
             if(pInput)
              pInput->Release();
             if(pAnchor)
              pAnchor->Release();
             if(pTextArea)
              pTextArea->Release();
             if(pFrame&&bFocus)
              pFrame->Release();
             if(bFocus)
             {
              pElement2->Release();
              break;
             }
            }
           }
           pElement2->Release();
          }
         }
         else
         {
          IHTMLElement* pElement=NULL;   
          if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLElement,(void**)&pElement)))
          {
           long lCurSrcIndex;
           pElement->get_sourceIndex(&lCurSrcIndex);
           if(lCurSrcIndex==lActSrcIndex)//找到当前活动元素
           {
            bFassCurFocus=TRUE;
           }
           pElement->Release();
          }
         }
        }
       }//for
       pActiveElement->Release();
      }
     }
    }
    pColl->Release();
   }
   pDoc->Release();
}
return bFocus;
}
//////////////////////////
BOOL CHtmlView::SetFocusToPrev()
{
BOOL bFocus=FALSE;
BOOL bFassCurFocus=FALSE;
LPDISPATCH lpDisp=NULL;
m_pHost->m_pWebBrowser->get_Document(&lpDisp);
IHTMLDocument2 *pDoc=NULL;
lpDisp->QueryInterface(IID_IHTMLDocument2,(void**)&pDoc);
if(pDoc)
{
   IHTMLElementCollection* pColl = NULL;
   //得到所有元素
   if(SUCCEEDED(pDoc->get_all(&pColl)))
   {
    long   nNumElements;  
    if(SUCCEEDED(pColl->get_length(&nNumElements)))
    {
     if(nNumElements)
     {
      IHTMLElement* pActiveElement=NULL;
      if(SUCCEEDED(pDoc->get_activeElement(&pActiveElement)))
      {
       //这里已获得activeElement
       long lActSrcIndex;
       pActiveElement->get_sourceIndex(&lActSrcIndex);
       for(long i=nNumElements-1;i>=0;i--)  
       {
        VARIANT varName;
        varName.vt=VT_UINT;
        varName.lVal   =   i;
        VARIANT varIndex;
        LPDISPATCH lpElementDisp=NULL;
        pColl->item(varName,varIndex,&lpElementDisp);
        {
         if(bFassCurFocus)//过了焦点，出现可焦则焦
         {
          IHTMLElement2* pElement2=NULL;   
          if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLElement2,(void**)&pElement2)))
          {
           IHTMLInputElement2*pInput=NULL;
           IHTMLAnchorElement2* pAnchor=NULL;
           IHTMLTextAreaElement* pTextArea=NULL;
           if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLInputElement2,(void**)&pInput))
            ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLAnchorElement2,(void**)&pAnchor))
            ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLTextAreaElement,(void**)&pTextArea)))
           {
            if(pInput||pAnchor||pTextArea)
            {

             if(SUCCEEDED(pElement2->focus()))
             {
              pElement2->Release();
              bFocus=TRUE;
              break;
             }
             if(pInput)
              pInput->Release();
             if(pAnchor)
              pAnchor->Release();
             if(pTextArea)
              pTextArea->Release();
            }
           }
           pElement2->Release();
          }
         }
         else
         {
          IHTMLElement* pElement=NULL;   
          if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLElement,(void**)&pElement)))
          {
           long lCurSrcIndex;
           pElement->get_sourceIndex(&lCurSrcIndex);
           if(lCurSrcIndex==lActSrcIndex)//找到当前活动元素
           {
            bFassCurFocus=TRUE;
           }
           pElement->Release();
          }
         }
        }
       }//for
       pActiveElement->Release();
      }
     }
    }
    pColl->Release();
   }
   else
    Alert("er");
   pDoc->Release();
}
lpDisp->Release();
return bFocus;
}
void CHtmlView::SetFocusToFirst(LPDISPATCH pHtmlDocument)
{
IHTMLDocument2 *pDoc=NULL;
pHtmlDocument->QueryInterface(IID_IHTMLDocument2,(void**)&pDoc);
if(pDoc)
{
   IHTMLElementCollection* pColl = NULL;
   //得到所有元素
   if(SUCCEEDED(pDoc->get_all(&pColl)))
   {
    long   nNumElements;  
    if(SUCCEEDED(pColl->get_length(&nNumElements)))
    {
     if(nNumElements)
     {
      for(long i = 0;i< nNumElements;i++)  
      {
       VARIANT varName;
       varName.vt=VT_UINT;
       varName.lVal   =   i;
       VARIANT varIndex;
       LPDISPATCH lpElementDisp=NULL;
       pColl->item(varName,varIndex,&lpElementDisp);
       {

        IHTMLElement2* pElement2=NULL;   
        if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLElement2,(void**)&pElement2)))
        {
         IHTMLInputElement2*pInput=NULL;
         IHTMLAnchorElement2* pAnchor=NULL;
         IHTMLTextAreaElement* pTextArea=NULL;
         if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLInputElement2,(void**)&pInput))
          ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLAnchorElement2,(void**)&pAnchor))
          ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLTextAreaElement,(void**)&pTextArea)))
         {
          if(pInput||pAnchor||pTextArea)
          {

           if(SUCCEEDED(pElement2->focus()))
           {
            pElement2->Release();
            break;
           }
           if(pInput)
            pInput->Release();
           if(pAnchor)
            pAnchor->Release();
           if(pTextArea)
            pTextArea->Release();
          }
         }
         pElement2->Release();
        }
       }
      }
     }
    }
    pColl->Release();
   }
   pDoc->Release();
}
}
////////////////////////// http://www.wzszf.com/
void CHtmlView::SetFocusToLast()
{
   LPDISPATCH lpDisp=NULL;
m_pHost->m_pWebBrowser->get_Document(&lpDisp);
IHTMLDocument2 *pDoc=NULL;
lpDisp->QueryInterface(IID_IHTMLDocument2,(void**)&pDoc);
if(pDoc)
{
   IHTMLElementCollection* pColl = NULL;
   //得到所有元素
   if(SUCCEEDED(pDoc->get_all(&pColl)))
   {
    long   nNumElements;  
    if(SUCCEEDED(pColl->get_length(&nNumElements)))
    {
     if(nNumElements)
     {
      for(long i = nNumElements-1;i>=0;i--)  
      {
       VARIANT varName;
       varName.vt=VT_UINT;
       varName.lVal   =   i;
       VARIANT varIndex;
       LPDISPATCH lpElementDisp=NULL;
       pColl->item(varName,varIndex,&lpElementDisp);
       {

        IHTMLElement2* pElement2=NULL;   
        if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLElement2,(void**)&pElement2)))
        {
         IHTMLInputElement2*pInput=NULL;
         IHTMLAnchorElement2* pAnchor=NULL;
         IHTMLTextAreaElement* pTextArea=NULL;
         if(SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLInputElement2,(void**)&pInput))
          ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLAnchorElement2,(void**)&pAnchor))
          ||SUCCEEDED(lpElementDisp->QueryInterface(IID_IHTMLTextAreaElement,(void**)&pTextArea)))
         {
          if(pInput||pAnchor||pTextArea)
          {

           if(SUCCEEDED(pElement2->focus()))
           {
            pElement2->Release();
            break;
           }
           if(pInput)
            pInput->Release();
           if(pAnchor)
            pAnchor->Release();
           if(pTextArea)
            pTextArea->Release();
          }
         }
         pElement2->Release();
        }
       }
      }
     }
    }
    pColl->Release();
   }
   pDoc->Release();
}
lpDisp->Release();
}

理论上这个方法可以解决，事实也接近解决，当然在遇到Frame时候我碰到了极大挑战。结果，我开始重新思考解决方案。