导航：[首页]->[windows]->[CHtmlDialog C++调用js函数]

##简单的调用 通常的静态全局js函数调用比较简单

<script language="javascript" type="text/javascript">
function Test()
{
    alert("你调用了Test");
}
</script>

HRESULT CallJSFunction(                                                         
	CString bstrFunc,
	DISPPARAMS dispParams,
	VARIANT* varResult)
{                                                                                  
    if( m_spHtmlDoc==NULL )                                                        
    {                                                                              
	return S_FALSE;                                                            
    }                                                                              
	                                                                           
    CComPtr<IDispatch> spScript;                                                   
    HRESULT hr = m_spHtmlDoc->get_Script(&spScript);                               
    if(FAILED(hr))                                                                 
    {                                                                              
	return hr;                                                                 
    }                                                                              
	                                                                           
    DISPID dispid = NULL;                                                          
    hr = spScript->GetIDsOfNames(IID_NULL,&bstrFunc,1,                             
	    LOCALE_SYSTEM_DEFAULT,&dispid);                                        
    if(FAILED(hr))                                                                 
    {                                                                              
	return S_FALSE;                                                            
    }                                                                              
	                                                                           
    hr = spScript->Invoke(dispid,                                                  
	    IID_NULL,                                                              
	    LOCALE_USER_DEFAULT,                                                   
	    DISPATCH_METHOD,                                                       
	    &dispParams,                                                           
	    varResult,                                                             
	    NULL,                                                                  
	    NULL);                                                                 
    return hr;                                                                  
}

##动态函数

若js函数动态生成，例如某全局对象中的某个成员函数，或者嵌套更深

<script language="javascript" type="text/javascript">
var obj={
	subobj:{
		func:function()
		{
		}
	}
}
</script>

DISPID CWebBrowserBase::FindId(IDispatch *pObj, LPOLESTR pName)
{
    DISPID id = 0;
    if(FAILED(pObj->GetIDsOfNames(IID_NULL,&pName,1,LOCALE_SYSTEM_DEFAULT,&id))) id = -1;
    return id;
}

HRESULT CWebBrowserBase::GetProperty(IDispatch *pObj, LPOLESTR pName, VARIANT *pValue)
{
    DISPID dispid = FindId(pObj, pName);
    if(dispid == -1) return E_FAIL;

    DISPPARAMS ps;
    ps.cArgs = 0;
    ps.rgvarg = NULL;
    ps.cNamedArgs = 0;
    ps.rgdispidNamedArgs = NULL;

    return pObj->Invoke(dispid, IID_NULL, LOCALE_SYSTEM_DEFAULT, DISPATCH_PROPERTYGET, &ps, pValue, NULL, NULL);
}

HRESULT CWebBrowserBase::InvokeMethod(IDispatch *pObj, LPOLESTR pName, VARIANT *pVarResult, VARIANT *p, int cArgs)
{
    DISPID dispid = FindId(pObj, pName);
    if(dispid == -1) return E_FAIL;

    DISPPARAMS ps;
    ps.cArgs = cArgs;
    ps.rgvarg = p;
    ps.cNamedArgs = 0;
    ps.rgdispidNamedArgs = NULL;

    return pObj->Invoke(dispid, IID_NULL, LOCALE_SYSTEM_DEFAULT, DISPATCH_METHOD, &ps, pVarResult, NULL, NULL);
}

//获取globalObject
VARIANT globalObject;
CWebBrowserBase::GetProperty(pHtmlWindow, L"globalObject", &globalObject);
//调用globalObject.Test
CWebBrowserBase::InvokeMethod(globalObject.pdispVal, L"Test", &ret, params, 0);

##Tab键和粘贴 在某些系统中，快捷键无法使用，这是因为外部对话框直接“拿走”了这些快捷键,参考http://www.experts-exchange.com/Software/Internet_Email/Web_Browsers/Q_24711581.html，http://blog.csdn.net/tr0j4n/article/details/4565953.

####WebBrowser Keystroke Problems
lot of people have noticed that when they’re hosting the WebBrowser control in MFC, ATL, or standard C++ applications, they sometimes run into trouble with certain keys. These keystroke problems usually occur when typing into intrinsic controls such as text boxes that reside on Web pages loaded by the WebBrowser control. Usually these keys are accelerator keys such as Backspace, Delete, and Tab. The problem is that the intrinsic controls on a Web page do not automatically receive these accelerator keys. When the WebBrowser control receives an accelerator key message, it does not automatically pass it to child controls on a Web page. Therefore, you must somehow let the WebBrowser control know that it should pass these messages to controls on your Web page. The solution is always the same whether you are hosting the control in MFC, ATL, or standard C++: call the TranslateAcclerator method of the IOleInPlaceActiveObject interface that is implemented by the WebBrowser control. But where and how you should do this is often unclear. Let’s see how to work around keystroke problems in MFC, ATL, and standard C++ applications that are hosting the WebBrowser control.

具体改法是在MFC的PreTranslateMessage加入如下代码

BOOL   CMyView::PreTranslateMessage(MSG*   pMsg)   
{   
    if   (IsDialogMessage(pMsg))   
	    return   TRUE;   
    else   
	    return   CWnd::PreTranslateMessage(pMsg);   
}

##参考

  1. http://www.cnblogs.com/kzang/archive/2012/12/02/2798556.html
  2. http://www.cnblogs.com/lucc/archive/2010/11/24/1886087.html
  3. http://blog.csdn.net/catxl313/article/details/2204541