开发IE插件Toolbar

免费教你开发IE插件Toolbar的文章可真是少见。还好我在http://www.codeproject.com/里找到一篇，http://www.codeproject.com/atl/ietoolbartutorial.asp。不过还是花了一天的时间才自己编写一个Google Search Toolbar。

如果你下载了Internet Explorer Toolbar (Deskband) Tutorial的源代码后编译不通过，也不用奇怪，我就是耽搁在这些地方。先说说都有哪些编译问题。

1．编译的问题

如果遇到下面的问题，就说明commctrl.h的版本低。我们完全可以不用TBSTYLE_EX_MIXEDBUTTONS，用TBSTYLE_EX_DRAWDDARROWS就行。另外的三个删掉，换成

TBSTYLE_BUTTON | TBSTYLE_AUTOSIZE，这个问题就解决了。

error C2065: 'TBSTYLE_EX_MIXEDBUTTONS' : undeclared identifier
error C2065: 'BTNS_BUTTON' : undeclared identifier
error C2065: 'BTNS_AUTOSIZE' : undeclared identifier
error C2065: 'BTNS_SHOWTEXT' : undeclared identifier

如果遇到下面问题，把工程文件（dsp）里面的/D _ATL_MIN_CRT删掉。

Linking...
Creating library ReleaseUMinDependency/MotleyFool.lib and object ReleaseUMinDependency/MotleyFool.exp
LIBCMT.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
ReleaseUMinDependency/MotleyFool.dll : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

MotleyFool.dll - 2 error(s), 0 warning(s)

 

如果你自己重新编写一个新的项目实现IE Toolbar的话，注意一下2个地方。

1．注意CMFToolbar的消息映射顺序。CHAIN_MSG_MAP_MEMBER一定要在WM_CREATE的前面。

              BEGIN_MSG_MAP(CToolbarWnd)

                            CHAIN_MSG_MAP_MEMBER(m_EditWnd)

                            MESSAGE_HANDLER(WM_CREATE, OnCreate)

                            …

              END_MSG_MAP()

2．注意CReflectionWnd的消息映射顺序。WM_CREATE一定要在CHAIN_MSG_MAP_MEMBER的前面。

              BEGIN_MSG_MAP(CReflectWnd)

                            MESSAGE_HANDLER(WM_CREATE, OnCreate)

                            CHAIN_MSG_MAP_MEMBER(m_ToolbarWnd)

              END_MSG_MAP()

2．Google Search Toolbar

 

http://www.codeproject.com/atl/ietoolbartutorial.asp有非常详细的开发步骤，在这里就不重复了。本节的目的是实现Google Search功能。创建ColimasBar工程，

创建CColimasBar类，IE Plugin接口，继承

              public CComObjectRootEx<CComSingleThreadModel>,

              public CComCoClass<CColimasBar, &CLSID_ColimasBar>,

              public IDeskBand,

              public IInputObject,

              public IObjectWithSite,

              public IDispatchImpl<IColimasBar, &IID_IColimasBar, &LIBID_IEBASELib>

创建CEditWnd类，输入栏控件，继承

              public CWindowImpl<CEditWnd>

创建CReflectWnd类，消息传递空间，继承

public CWindowImpl<CEditWnd>

创建CToolbarWnd类，Toolbar控件，继承

              public CWindowImpl<CEditWnd>

 

修改Toolbar的Title：

const WCHAR TITLE_CColimasBar[] = L"Google";

修改Button的Title：

              TCHAR* pCaption = _T("Search!");

增加Button点击事件的Google Search处理函数GetValue

void CToolbarWnd::GetValue()

{

   // if we have a web browser pointer then try to navigate to google site to retrieve search

   if (m_pBrowser)

   {

      VARIANT vEmpty;

      VariantInit(&vEmpty);

      m_pBrowser->Stop();

      _bstr_t bsSite;

      // if the user has entered url then append them to the edit

      if (m_EditWnd.GetWindowTextLength())

      {

         WCHAR *bstr = NULL;

         m_EditWnd.GetWindowText(&bstr);

 

                             UINT i= WideCharToMultiByte(CP_UTF8,0,bstr,-1,NULL,0,NULL,NULL);  //双字节转换

                             char *strB=new char[i];

                             WideCharToMultiByte (CP_UTF8,0,bstr,-1,strB,i,NULL,NULL); //转换为ASCII

                             UINT len=i;

                             char* tmp=new char[len*3];

                             tmp[0]='\0';

 

                             for(i=0;i<len-1;i++)

                             {

                                          byte j= (unsigned char)strB[i];                                  sprintf(tmp,"%s%%%x",tmp,j); //转换为16进制。

 

                             }

 

         bsSite = L"http://www.google.com/search?hl=zh-CN&q=";

              //Google Search字符串

         bsSite += tmp;

                             bsSite += "&rls=com.microsoft:en-US&ie=utf8&oe=utf8";

         SysFreeString(bstr);

                             delete[] strB;

      }

      else

         bsSite = "http://www.google.com/";

      // have the webrowser navigate to the site URL requested depending on user input.

      m_pBrowser->Navigate(bsSite, &vEmpty, &vEmpty, &vEmpty, &vEmpty);

   }

}

本文涉及到的所有知识请参照http://www.codeproject.com/atl/ietoolbartutorial.asp