Loading... <p class="alt"><span>随着网络免费的大潮的退去,网站变得越来越商业化。浏览一些常去的网站,每看一个页面都会弹出N多的广告窗口,而且都是花花绿绿的Flash和Gif小动画,浪费带宽(我在家还是拨号上网),同时干扰了正常的阅读,非常讨厌。那么如何才能将这些广告屏蔽掉呢?答案就是Browser Helper Object(简称BHO)。</span></p><p class="alt"><span>BHO实际上也是一个简单的IE扩展COM组件,它和其它COM组件的区别就在于其它扩展需要一些用户的手工操作,如点击菜单,点击工具条按钮,在地址栏输入 网址等等触发动作才会被IE加载。而BHO则不同,每当IE启动时,都会自动去加载BHO而无须任何触发条件,另外BHO还可以监听IE的各类事件的通知消息,比如窗 口大小的变化,下载是否完成等事件。</span></p><p class="alt"><span>由于BHO可以在一启动IE就被加载,并能监听各种事件,我们就可以使用BHO扩展实现限制用户浏览某些色情网站,或者搜集用户浏览喜好信息等功能。接下来, 我们就来实现一个能够阻断广告弹出的BHO扩展。 </span></p><div class="codeText"><div class="codeHead">delphi代码</div><ol class="dp-delphi"> <li class="alt"><span>创建COM组件 </span></li> <li class=""><span> </span></li> <li class="alt"><span> 新建一个ActiveX Library,保存为IEBHO</span><span class="number">.</span><span>dpr,然后新建一个名为TIEAdvBHO的COM Object,然后保存生成的文件为CIEBHO</span><span class="number">.</span><span>pas,作为BHO扩展,需要实现两 个接口IObjectWithSite和IDispatch,其中 IObjectWithSite接口同前面的工具条扩展一样可以用来获得浏览器的接口,而IDispatch接口,则被用来监听浏览器的事件。下面就是BHO扩展的类定义: </span></li> <li class=""><span> </span></li> <li class="alt"><span class="keyword">type</span><span> </span></li> <li class=""><span> TTIEAdvBHO = </span><span class="keyword">class</span><span>(TComObject, IObjectWithSite, IDispatch) </span></li> <li class="alt"><span> </span><span class="keyword">private</span><span> </span></li> <li class=""><span> FIESite: IUnknown; </span></li> <li class="alt"><span> FIE: IWebBrowser2; </span></li> <li class=""><span> FCPC: IConnectionPointContainer; </span></li> <li class="alt"><span> FCP: IConnectionPoint; </span></li> <li class=""><span> FCookie: Integer; </span></li> <li class="alt"><span> </span><span class="keyword">protected</span><span> </span></li> <li class=""><span> </span><span class="comment">//IObjectWithSite接口方法定义 </span><span> </span></li> <li class="alt"><span> </span><span class="keyword">function</span><span> SetSite(</span><span class="keyword">const</span><span> pUnkSite: IUnknown): HResult; stdcall; </span></li> <li class=""><span> </span><span class="keyword">function</span><span> GetSite(</span><span class="keyword">const</span><span> riid: TIID; out site: IUnknown): HResult; stdcall; </span></li> <li class="alt"><span> </span><span class="comment">//IDispatch接口方法定义 </span><span> </span></li> <li class=""><span> </span><span class="keyword">function</span><span> GetTypeInfoCount(out Count: Integer): HResult; stdcall; </span></li> <li class="alt"><span> </span><span class="keyword">function</span><span> GetTypeInfo(Index, LocaleID: Integer; out TypeInfo): HResult; </span></li> <li class=""><span> stdcall; </span></li> <li class="alt"><span> </span><span class="keyword">function</span><span> GetIDsOfNames(</span><span class="keyword">const</span><span> IID: TGUID; Names: Pointer; </span></li> <li class=""><span> NameCount, LocaleID: Integer; DispIDs: Pointer): HResult; stdcall; </span></li> <li class="alt"><span> </span><span class="keyword">function</span><span> Invoke(DispID: Integer; </span><span class="keyword">const</span><span> IID: TGUID; LocaleID: Integer; </span></li> <li class=""><span> Flags: Word; </span><span class="keyword">var</span><span> Params; VarResult, ExcepInfo, ArgErr: Pointer): HResult; </span></li> <li class="alt"><span> stdcall; </span></li> <li class=""><span> </span><span class="comment">//阻断广告弹出事件处理过程 </span><span> </span></li> <li class="alt"><span class="keyword">procedure</span><span> DoNewWindow2(</span><span class="keyword">var</span><span> ppDisp: IDispatch; </span><span class="keyword">var</span><span> Cancel: WordBool); </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> DoBeforeNavigate2(</span><span class="keyword">const</span><span> pDisp: IDispatch; </span><span class="keyword">var</span><span> URL: OleVariant; </span><span class="keyword">var</span><span> Flags: OleVariant; </span><span class="keyword">var</span><span> TargetFrameName: OleVariant; </span><span class="keyword">var</span><span> PostData: OleVariant;</span><span class="keyword">var</span><span> Headers: OleVariant; </span><span class="keyword">var</span><span> Cancel: WordBool); </span></li> <li class="alt"><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span>IObjectWithSite的接口的实现 </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span>先看IObjectWithSite的接口的实现,当IE加载BHO扩展后,会调用BHO的扩展,把自身的IUnknown接口作为参数pUnkSite传给扩展,BHO扩展应该从pUnkSite参数中获得浏览器接口IWebBrowser2,同时为了监听浏览器的事件,还需要获得事件链接点接口,IE的支持的事件都定义在DWebBrowserEvents2的双接口中,使用链接点的Advise方法建立对IE事件的监听,注意Advise方法调用后 会返回一个Cookie,需要保存Cookie,后面在退出IE时,需要Cookie作为参数来断开对IE事件的监听。 </span></li> <li class="alt"><span> </span></li> <li class=""><span class="keyword">function</span><span> TTIEAdvBHO</span><span class="number">.</span><span>SetSite(</span><span class="keyword">const</span><span> pUnkSite: IInterface): HResult; </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> Result := E_FAIL; </span></li> <li class="alt"><span> </span><span class="comment">//保存接口 </span><span> </span></li> <li class=""><span> FIESite := pUnkSite; </span></li> <li class="alt"><span> </span><span class="keyword">if</span><span> </span><span class="keyword">not</span><span> Supports(FIESite, IWebBrowser2, FIE) </span><span class="keyword">then</span><span> </span></li> <li class=""><span>Exit; </span></li> <li class="alt"><span> </span><span class="comment">//获得事件连接点 </span><span> </span></li> <li class=""><span> </span><span class="keyword">if</span><span> </span><span class="keyword">not</span><span> Supports(FIE, IConnectionPointContainer, FCPC) </span><span class="keyword">then</span><span> </span></li> <li class="alt"><span> Exit; </span></li> <li class=""><span> FCPC</span><span class="number">.</span><span>FindConnectionPoint(DWebBrowserEvents2, FCP); </span></li> <li class="alt"><span> </span><span class="comment">//监听事件 </span><span> </span></li> <li class=""><span> FCP</span><span class="number">.</span><span>Advise(Self, FCookie); </span></li> <li class="alt"><span> Result := S_OK; </span></li> <li class=""><span class="keyword">end</span><span>; </span></li> <li class="alt"><span>后面IE有时会调用IObjectWithSite接口的GetSite方法获得需要的接口,这时可以将保存的接口返回。 </span></li> <li class=""><span> </span></li> <li class="alt"><span class="keyword">function</span><span> TTIEAdvBHO</span><span class="number">.</span><span>GetSite(</span><span class="keyword">const</span><span> riid: TIID; </span></li> <li class=""><span> out site: IInterface): HResult; </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> </span><span class="keyword">if</span><span> Supports(FIESite, riid,site) </span><span class="keyword">then</span><span> </span></li> <li class="alt"><span> Result := S_OK </span></li> <li class=""><span> </span><span class="keyword">else</span><span> </span></li> <li class="alt"><span> Result:= E_NOINTERFACE; </span></li> <li class=""><span class="keyword">end</span><span>; </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span>IDispatch接口的实现 </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span>前面我们在SetSite中建立了对IE事件的监听,建立事件监听后每当IE产生了新的事件,它就会调用扩展的IDispatch接口的Invoke方法通知扩展发生的事件类型以及事件参数,并请求扩展对事件进行处理。因此对于BHO扩展来说,IDispatch接口的Invoke方法是必须实现的,而其它的GetTypeInfoCount,GetTypeInfo和GetIDsOfNames方法都无须实现,只要返回结果为E_NOTIMPL,表示未实现该方法就可以了。 </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span class="keyword">function</span><span> TTIEAdvBHO</span><span class="number">.</span><span>GetIDsOfNames(</span><span class="keyword">const</span><span> IID: TGUID; Names: Pointer; </span></li> <li class=""><span> NameCount, LocaleID: Integer; DispIDs: Pointer): HResult; </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> Result := E_NOTIMPL; </span></li> <li class="alt"><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span></li> <li class="alt"><span class="keyword">function</span><span> TTIEAdvBHO</span><span class="number">.</span><span>GetTypeInfo(Index, LocaleID: Integer; </span></li> <li class=""><span> out TypeInfo): HResult; </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> Result := E_NOTIMPL; </span></li> <li class="alt"><span> </span><span class="keyword">pointer</span><span>(TypeInfo) := </span><span class="keyword">nil</span><span>; </span></li> <li class=""><span class="keyword">end</span><span>; </span></li> <li class="alt"><span> </span></li> <li class=""><span class="keyword">function</span><span> TTIEAdvBHO</span><span class="number">.</span><span>GetTypeInfoCount(out Count: Integer): HResult; </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> Result := E_NOTIMPL; </span></li> <li class="alt"><span> Count := </span><span class="number">0</span><span>; </span></li> <li class=""><span class="keyword">end</span><span>; </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span>事件的监听 </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span>IE支持的事件都定义在DWebEvents2接口中,如下: </span></li> <li class=""><span> </span></li> <li class="alt"><span> DWebBrowserEvents2 = dispinterface </span></li> <li class=""><span> [</span><span class="string">'{34A715A0-6587-11D0-924A-0020AFC7AC4D}'</span><span>] </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> StatusTextChange(</span><span class="keyword">const</span><span> Text: WideString); dispid </span><span class="number">102</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> ProgressChange(Progress: Integer; ProgressMax: Integer); dispid </span><span class="number">108</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> CommandStateChange(Command: Integer; Enable: WordBool); dispid </span><span class="number">105</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> DownloadBegin; dispid </span><span class="number">106</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> DownloadComplete; dispid </span><span class="number">104</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> TitleChange(</span><span class="keyword">const</span><span> Text: WideString); dispid </span><span class="number">113</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> PropertyChange(</span><span class="keyword">const</span><span> szProperty: WideString); dispid </span><span class="number">112</span><span>; </span></li> <li class=""><span class="keyword">procedure</span><span> BeforeNavigate2(</span><span class="keyword">const</span><span> pDisp: IDispatch; </span><span class="keyword">var</span><span> URL: OleVariant; </span><span class="keyword">var</span><span> Flags: </span></li> <li class="alt"><span> OleVariant; </span><span class="keyword">var</span><span> TargetFrameName: OleVariant; </span><span class="keyword">var</span><span> PostData: OleVariant; </span></li> <li class=""><span class="keyword">var</span><span> Headers: OleVariant; </span><span class="keyword">var</span><span> Cancel: WordBool); dispid </span><span class="number">250</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> NewWindow2(</span><span class="keyword">var</span><span> ppDisp: IDispatch; </span><span class="keyword">var</span><span> Cancel: WordBool); dispid </span><span class="number">251</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> NavigateComplete2(</span><span class="keyword">const</span><span> pDisp: IDispatch; </span><span class="keyword">var</span><span> URL: OleVariant); dispid </span><span class="number">252</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> DocumentComplete(</span><span class="keyword">const</span><span> pDisp: IDispatch; </span><span class="keyword">var</span><span> URL: OleVariant); dispid </span><span class="number">259</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> OnQuit; dispid </span><span class="number">253</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> OnVisible(Visible: WordBool); dispid </span><span class="number">254</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> OnToolBar(ToolBar: WordBool); dispid </span><span class="number">255</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> OnMenuBar(MenuBar: WordBool); dispid </span><span class="number">256</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> OnStatusBar(StatusBar: WordBool); dispid </span><span class="number">257</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> OnFullScreen(FullScreen: WordBool); dispid </span><span class="number">258</span><span>; </span></li> <li class=""><span> </span><span class="keyword">procedure</span><span> OnTheaterMode(TheaterMode: WordBool); dispid </span><span class="number">260</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span>可以看到每个事件中的后面都有一个dispid关键加上数字如 </span><span class="number">258</span><span> ,</span><span class="number">260</span><span>等等。Dispid的数字就是事件类型的标识符号。IDispatch的Invoke方法定义如下: </span></li> <li class="alt"><span> </span><span class="keyword">function</span><span> Invoke(DispID: Integer; </span><span class="keyword">const</span><span> IID: TGUID; LocaleID: Integer; </span></li> <li class=""><span>Flags: Word; </span><span class="keyword">var</span><span> Params; VarResult, ExcepInfo, ArgErr: Pointer): HResult; </span></li> <li class="alt"><span> </span></li> <li class=""><span>当IE调用Invoke方法时,会设定DispId参数为事件的标识符号,这样我们就可以知道IE发生了什么事件。对于要实现 的阻断广告窗口弹出来说,我们只需关心BeforeNavigate2和OnQuit事件就可以了,因为当广告窗口弹出前,会激发 IE的BeforeNavigate2事件,而弹出式窗口一般没有工具条,所以只要BeforeNavigate2事件中判断当前页面是否有 工具条就可以判断是否是弹出窗口,并予以禁止。而当IE退出时,会激发OnQuit事件,在OnQuit事件中应该断开事件 监听,同时清理分配的资源。下面就是截获BeforeNavigate2和OnQuit事件的Invoke方法的实现: </span></li> <li class="alt"><span> </span></li> <li class=""><span class="keyword">procedure</span><span> BuildPositionalDispIds(pDispIds: PDispIdList; </span><span class="keyword">const</span><span> dps: TDispParams); </span></li> <li class="alt"><span class="keyword">var</span><span> </span></li> <li class=""><span> i: </span><span class="keyword">integer</span><span>; </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> Assert(pDispIds <> </span><span class="keyword">nil</span><span>); </span></li> <li class="alt"><span> </span><span class="keyword">for</span><span> i := </span><span class="number">0</span><span> </span><span class="keyword">to</span><span> dps</span><span class="number">.</span><span>cArgs - </span><span class="number">1</span><span> </span><span class="keyword">do</span><span> </span></li> <li class=""><span> pDispIds^[i] := dps</span><span class="number">.</span><span>cArgs - </span><span class="number">1</span><span> - i; </span></li> <li class="alt"><span> </span><span class="keyword">if</span><span> (dps</span><span class="number">.</span><span>cNamedArgs <= </span><span class="number">0</span><span>) </span><span class="keyword">then</span><span> </span></li> <li class=""><span> Exit; </span></li> <li class="alt"><span> </span><span class="keyword">for</span><span> i := </span><span class="number">0</span><span> </span><span class="keyword">to</span><span> dps</span><span class="number">.</span><span>cNamedArgs - </span><span class="number">1</span><span> </span><span class="keyword">do</span><span> </span></li> <li class=""><span> pDispIds^[dps</span><span class="number">.</span><span>rgdispidNamedArgs^[i]] := i; </span></li> <li class="alt"><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span class="keyword">function</span><span> TTIEAdvBHO</span><span class="number">.</span><span>Invoke(DispID: Integer; </span><span class="keyword">const</span><span> IID: TGUID; </span></li> <li class="alt"><span> LocaleID: Integer; Flags: Word; </span><span class="keyword">var</span><span> Params; VarResult, ExcepInfo, </span></li> <li class=""><span> ArgErr: Pointer): HResult; </span></li> <li class="alt"><span class="keyword">var</span><span> </span></li> <li class=""><span> dps: TDispParams absolute Params; </span></li> <li class="alt"><span> bHasParams: </span><span class="keyword">boolean</span><span>; </span></li> <li class=""><span> pDispIds: PDispIdList; </span></li> <li class="alt"><span> iDispIdsSize: </span><span class="keyword">integer</span><span>; </span></li> <li class=""><span class="keyword">begin</span><span> </span></li> <li class="alt"><span> pDispIds := </span><span class="keyword">nil</span><span>; </span></li> <li class=""><span> iDispIdsSize := </span><span class="number">0</span><span>; </span></li> <li class="alt"><span> bHasParams := (dps</span><span class="number">.</span><span>cArgs > </span><span class="number">0</span><span>); </span></li> <li class=""><span> </span><span class="keyword">if</span><span> (bHasParams) </span><span class="keyword">then</span><span> </span></li> <li class="alt"><span> </span><span class="keyword">begin</span><span> </span></li> <li class=""><span> iDispIdsSize := dps</span><span class="number">.</span><span>cArgs * SizeOf(TDispId); </span></li> <li class="alt"><span> GetMem(pDispIds, iDispIdsSize); </span></li> <li class=""><span> </span><span class="keyword">end</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">try</span><span> </span></li> <li class=""><span> </span><span class="keyword">if</span><span> (bHasParams) </span><span class="keyword">then</span><span> </span></li> <li class="alt"><span> BuildPositionalDispIds(pDispIds, dps); </span></li> <li class=""><span> Result := S_OK; </span></li> <li class="alt"><span> </span><span class="keyword">case</span><span> DispId </span><span class="keyword">of</span><span> </span></li> <li class=""><span> </span><span class="number">250</span><span>:</span><span class="comment">//BeforeNaviage2事件id </span><span> </span></li> <li class="alt"><span> </span><span class="keyword">begin</span><span> </span></li> <li class=""><span> DoBeforeNavigate2(IDispatch(dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">0</span><span>]].dispval), </span></li> <li class="alt"><span> POleVariant(dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">1</span><span>]].pvarval)^, </span></li> <li class=""><span> POleVariant(dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">2</span><span>]].pvarval)^, </span></li> <li class="alt"><span> POleVariant(dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">3</span><span>]].pvarval)^, </span></li> <li class=""><span> POleVariant(dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">4</span><span>]].pvarval)^, </span></li> <li class="alt"><span> POleVariant(dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">5</span><span>]].pvarval)^, </span></li> <li class=""><span> dps</span><span class="number">.</span><span>rgvarg^[pDispIds^[</span><span class="number">6</span><span>]].pbool^); </span></li> <li class="alt"><span> </span><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span><span class="number">253</span><span>:</span><span class="comment">//OnQuit事件ID </span><span> </span></li> <li class="alt"><span> </span><span class="keyword">begin</span><span> </span></li> <li class=""><span> FCP</span><span class="number">.</span><span>Unadvise(FCookie); </span></li> <li class="alt"><span> </span><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span><span class="keyword">else</span><span> </span></li> <li class="alt"><span> Result := DISP_E_MEMBERNOTFOUND; </span></li> <li class=""><span> </span><span class="keyword">end</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">finally</span><span> </span></li> <li class=""><span> </span><span class="keyword">if</span><span> (bHasParams) </span><span class="keyword">then</span><span> </span></li> <li class="alt"><span> FreeMem(pDispIds, iDispIdsSize); </span></li> <li class=""><span> </span><span class="keyword">end</span><span>; </span></li> <li class="alt"><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span>在Invoke方法中,Params参数包含了被激发的事件包含的参数的数目以及参数的值,而BuildPositionalDispIds 则从Params参数中提取参数值,并放到数组中,然后在BeforeNavigate2事件中,调用DoBeforeNavigate2过程对 事件进行处理,事件参数作为过程参数被传递过去,下面是具体禁止弹出网页的DoBeforeNavigate2的处理过程: </span></li> <li class="alt"><span> </span></li> <li class=""><span class="keyword">procedure</span><span> TTIEAdvBHO</span><span class="number">.</span><span>DoBeforeNavigate2(</span><span class="keyword">const</span><span> pDisp: IDispatch; </span><span class="keyword">var</span><span> URL, </span></li> <li class="alt"><span> Flags, TargetFrameName, PostData, Headers: OleVariant; </span></li> <li class=""><span> </span><span class="keyword">var</span><span> Cancel: WordBool); </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> </span><span class="keyword">if</span><span> FIE</span><span class="number">.</span><span>ToolBar=</span><span class="number">0</span><span> </span><span class="keyword">then</span><span> FIE</span><span class="number">.</span><span>Quit; </span></li> <li class="alt"><span class="keyword">end</span><span>; </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span>在过程中,首先,调用IWebBrowser2接口的Toolbar属性判断页面是否有工具条,如果没有,则调用IE的退出方法关闭弹出窗口。另外在Invoke中还在OnQuit事件激发时,调用事件连接点的UnAdvise方法,断开事件监听。 </span></li> <li class="alt"><span> </span></li> <li class=""><span> 注册扩展 </span></li> <li class="alt"><span> </span></li> <li class=""><span> 注册扩展非常简单,只要在注册表中关键字HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion </span></li> <li class="alt"><span>\explorer\Browser Helper Objects\下添加值为扩展的Guid的字符串形式的下级关键字就可以了。 </span></li> <li class=""><span> </span></li> <li class="alt"><span> </span><span class="keyword">type</span><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span> TIEAdvBHOFactory = </span><span class="keyword">class</span><span>(TComObjectFactory) </span></li> <li class=""><span> </span><span class="keyword">public</span><span> </span></li> <li class="alt"><span> </span><span class="keyword">procedure</span><span> UpdateRegistry(Register: Boolean); override; </span></li> <li class=""><span> </span><span class="keyword">end</span><span>; </span></li> <li class="alt"><span> </span></li> <li class=""><span class="comment">{ TIEAdvBHOFactory }</span><span> </span></li> <li class="alt"><span> </span></li> <li class=""><span class="keyword">procedure</span><span> TIEAdvBHOFactory</span><span class="number">.</span><span>UpdateRegistry(Register: Boolean); </span></li> <li class="alt"><span class="keyword">begin</span><span> </span></li> <li class=""><span> </span><span class="keyword">inherited</span><span>; </span></li> <li class="alt"><span> </span><span class="keyword">if</span><span> Register </span><span class="keyword">then</span><span> </span></li> <li class=""><span> CreateRegKeyValue(HKEY_LOCAL_MACHINE, </span><span class="string">'Software\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\' + GuidToString(ClassID), '</span><span class="string">', '</span><span class="string">') </span> </li> <li class="alt"><span><span class="string"> else </span> </span></li> <li class=""><span><span class="string"> DeleteRegKeyValue(HKEY_LOCAL_MACHINE, '</span><span>Software\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\</span><span class="string">' + GuidToString(ClassID), '</span><span class="string">'); </span> </span></li> <li class="alt"><span><span class="string">end; </span> </span></li> <li class=""><span><span class="string"> </span> </span></li> <li class="alt"><span><span class="string">initialization </span> </span></li> <li class=""><span><span class="string"> TIEAdvBHOFactory.Create(ComServer, TTIEAdvBHO, Class_TIEAdvBHO, </span> </span></li> <li class="alt"><span><span class="string"> '</span><span>TIEAdvBHO</span><span class="string">', '</span><span>', ciMultiInstance, tmApartment); </span></span></li> <li class=""><span class="keyword">end</span><span>. </span></li> <li class="alt"><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span>注册扩展后,打开浏览器浏览新浪网站(http:</span><span class="comment">//www.sina.com.cn),你会发现平时讨厌的弹出广告窗口都消失了。 </span><span> </span></li> <li class=""><span> </span></li> <li class="alt"><span>文章来源:http:</span><span class="comment">//delphi.sharpplus.com/Delphi/bho.htm </span><span> </span></li></ol></div> 相关文章 关于px、em、rem、rpx、upx的知识 CentOS7 + 宝塔环境搭建 Gogs 私人Git 仓库 美图WEB开放平台-图片美化上传插件 Typecho侧栏增加“成长历史”信息 Delphi7调用C#的webservice,在windows2008下不能运行?? Delphi ListView排序 Delphi中获取Unix时间戳及注意事项 恢复delphi7 文件关联 delphi Format格式化函数 如何将Bitmap位图与base64字符串相互转换 Last modification:August 16th, 2009 at 12:30 pm © 允许规范转载 Support 如果觉得我的文章对你有用,请随意赞赏 ×Close Appreciate the author Sweeping payments Pay by AliPay Pay by WeChat