🚀 go-pugleaf

Hi Remy,

Thank you so much, this is exactly what I was looking for.

BR

"Remy Lebeau (TeamB)" <gambit47.no.spam@no.spam.yahoo.com> wrote in message
news:3f84a0b8@newsgroups.borland.com...
>
> "Martin C" <martinc@aol.com> wrote in message
> news:3f84957c@newsgroups.borland.com...
>
> > So can someone tell me please were I can find any
> > sample/tutorial on using BHO under BCB.
> >
> > P.S. If anyone have a sample that will be more than great...
>
> There's nothing too special about making a BHO:
>
> 1) Create a new ActiveX Library containing a TypeLibrary with an interface
> and CoClass.  The easiest way to make that is to use the "File | New |
> ActiveX | ActiveX Library" and "File | New | ActiveX | COM Object"
wizards.
> Make the COM object apartment-threaded, marked with OleAutomation, and no
> events support.
>
> 2) In the resulting TypeLibrary, leave the interface empty (containing no
> methods) and make it derive from IDispatch.
>
> 3) In the interface's generated Impl unit, add IObjectWithSiteImpl and
> IDispatchImpl to the Impl class's ancestor list, and add IDispatch and
> IObjectWithSite to the COM_MAP
>
> 4) Add an IWebBrowser2 member to the class.  Optionally, if you plan on
> intercepting the browser's events, then add an IConnectionPointContainer
> member and a DWORD member as well.
>
> 5) Update the Impl class's UpdateRegistry() method to register the BHO
with
> IE when the interface itself it registered with the OS in general.
>
> 6) Override the inherited IObjectWithSite::SetSite() method.  This is
where
> the browser will give your BHO its IWebBrowser2 instance for your use.
>
> 7) If you plan on supporting the browser's events, then also override the
> IDispatch::Invoke() method.  This is where the events will come through.
>
> 8) open up the main source file for the project and edit the
DllEntryPoint()
> to look for explorer.exe.  Since Windows Explorer is integrated with
> Internet Explorer starting with IE4, BHOs can be loaded by both Windows
> Explorer and IE for different purposes.  If you only want to wok with IE,
> then you need to have DllEntryPoint() return FALSE if explorer.exe is
> detected.
>
>
> Now, with all of that said, here is a snippet from my own BHO
implementation
> (names changed to protect the innocent):
>
>
>     --- MyBHO.cpp ---
>
>     // auto-generated stuff ...
>
>     int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void*)
>     {
>         if (reason == DLL_PROCESS_ATTACH)
>         {
>             TCHAR pszLoader[MAX_PATH+1] = {0};
>             GetModuleFileName(NULL, pszLoader, MAX_PATH);
>             if( AnsiSameText(pszLoader, "explorer.exe") )
>                 return FALSE;
>             _Module.Init(ObjectMap, hinst);
>             DisableThreadLibraryCalls(hinst);
>         }
>         return TRUE;
>     }
>
>     // more auto-generated stuff ...
>
>
>     --- MyBHOImpl.h ---
>
>     // MYBHOIMPL.H : Declaration of the TMyBHOImpl
>
>     #ifndef MyBHOImplH
>     #define MyBHOImplH
>
>     #include "MyBHO_TLB.H"
>     #include <Exdisp.h> // for IWebBrowser2
>
>
>
////////////////////////////////////////////////////////////////////////////
> /
>     // TMyBHOImpl     Implements IMyBHO, default interface of MyBHO
>     // ThreadingModel : Apartment
>     // Dual Interface : FALSE
>     // Event Support  : FALSE
>     // Default ProgID : MyBHO.MyBHO
>     // Description    : My Browser Helper Object
>
>
////////////////////////////////////////////////////////////////////////////
> /
>     class ATL_NO_VTABLE TMyBHOImpl :
>         public CComObjectRootEx<CComSingleThreadModel>,
>         public CComCoClass<TMyBHOImpl, &CLSID_MyBHO>,
>         public IObjectWithSiteImpl<TMyBHOImpl>,
>         public IDispatchImpl<IMyBHO, &IID_IMyBHO, &LIBID_MyBHO>
>     {
>     private:
>         CComQIPtr<IWebBrowser2, &IID_IWebBrowser2> m_spWebBrowser2;
>         CComQIPtr<IConnectionPointContainer,
&IID_IConnectionPointContainer>
> m_spCPC;
>         DWORD m_dwCookie;
>
>         static void UpdateBrowserRegistration(REFCLSID rclsid, BOOL
> bRegister);
>         HRESULT ManageConnection(bool DoAdvise);
>
>     public:
>         TMyBHOImpl();
>
>         STDMETHOD(SetSite)(IUnknown *pUnkSite);
>         STDMETHOD(Invoke)(DISPID dispidMember, REFIID riid, LCID lcid,
WORD
> wFlags, DISPPARAMS* pDispParams, VARIANT* pvarResult, EXCEPINFO*
pExcepInfo,
> UINT* puArgErr);
>
>         // Data used when registering Object
>         //
>         DECLARE_THREADING_MODEL(otApartment);
>         DECLARE_PROGID("MyBHO.MyBHO");
>         DECLARE_DESCRIPTION("My Browser Helper Object");
>
>         // Function invoked to (un)register object
>         //
>         static HRESULT WINAPI UpdateRegistry(BOOL bRegister)
>         {
>             TTypedComServerRegistrarT<TURLStripperImpl>
>             regObj(GetObjectCLSID(), GetProgID(), GetDescription());
>             UpdateBrowserRegistration(GetObjectCLSID(), bRegister);
>             return regObj.UpdateRegistry(bRegister);
>         }
>
>         BEGIN_COM_MAP(TMyBHOImpl)
>             COM_INTERFACE_ENTRY(IMyBHO)
>             COM_INTERFACE_ENTRY2(IDispatch, IMyBHO)
>             COM_INTERFACE_ENTRY(IObjectWithSite)
>         END_COM_MAP()
>     };
>
>     #endif //MyBHOImplH
>
>
>     --- MyBHOImpl.cpp ---
>
>     // MYBHOIMPL : Implementation of TMyBHOImpl (CoClass: MyBHO,
Interface:
> IMyBHO)
>
>     #include <vcl.h>
>     #pragma hdrstop
>
>     #include "MYBHOIMPL.H"
>     #include <exdispid.h>
>     #include <mshtml.h>
>
>
>
////////////////////////////////////////////////////////////////////////////
> /
>     // TMyBHOImpl
>
>     TMyBHOImpl::TMyBHOImpl()
>         : m_dwCookie(0)
>     {
>     }
>
>     void TMyBHOImpl::UpdateBrowserRegistration(REFCLSID rclsid, BOOL
> bRegister)
>     {
>         OLECHAR str[64] = {0};
>         StringFromGUID2(rclsid, str, 64);
>
>         HKEY hKey = NULL;
>         HKEY hTempKey = NULL;
>         DWORD Disposition;
>
>         if( RegCreateKeyEx(HKEY_LOCAL_MACHINE,
> "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Browser Helper
> Objects", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_CREATE_SUB_KEY, NULL,
&hKey,
> &Disposition) == ERROR_SUCCESS )
>         {
>             if( bRegister )
>             {
>                 if( RegCreateKeyEx(hKey, AnsiString(str).c_str(), 0, NULL,
> REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hTempKey, &Disposition) ==
> ERROR_SUCCESS )
>                 {
>                     RegSetValueEx(hTempKey, "", 0, REG_SZ,
> reinterpret_cast<BYTE*>("My BHO"), 7);
>                     RegCloseKey(hTempKey);
>                 }
>             }
>             else
>                 RegDeleteKey(hKey, AnsiString(str).c_str());
>
>             RegCloseKey(hKey);
>         }
>     }
>
>     STDMETHODIMP TMyBHOImpl::SetSite(IUnknown *pUnkSite)
>     {
>         HRESULT hr = IObjectWithSiteImpl<TMyBHOImpl>::SetSite(pUnkSite);
>         if( FAILED(hr) )
>             return hr;
>
>         // Retrieve and store the IWebBrowser2 pointer
>         m_spWebBrowser2 = pUnkSite;
>         if( m_spWebBrowser2 == NULL )
>             return E_INVALIDARG;
>
>         // Retrieve and store the IConnectionPointerContainer pointer
>         m_spCPC = m_spWebBrowser2;
>         if( m_spCPC == NULL )
>             return E_POINTER;
>
>         // Connect to the container for receiving event notifications
>         return ManageConnection(true);
>     }
>
>     HRESULT TMyBHOImpl::ManageConnection(bool DoAdvise)
>     {
>         if( m_spCPC )
>         {
>             if( DoAdvise )
>                 return AtlAdvise(m_spCPC, GetUnknown(),
> DIID_DWebBrowserEvents2, &m_dwCookie);
>             else
>                 return AtlUnadvise(m_spCPC, DIID_DWebBrowserEvents2,
> m_dwCookie);
>         }
>
>         return S_OK;
>     }
>
>     STDMETHODIMP TMyBHOImpl::Invoke(DISPID dispidMember, REFIID riid, LCID
> lcid, WORD wFlags, DISPPARAMS* pDispParams, VARIANT* pvarResult,
EXCEPINFO*
> pExcepInfo, UINT* puArgErr)
>     {
>         switch( dispidMember )
>         {
>             case DISPID_BEFORENAVIGATE2:
>             {
>                 /*
>                 void BeforeNavigate2(IDispatch *pDisp, VARIANT *&url,
> VARIANT *&Flags, VARIANT *&TargetFrameName, VARIANT *&PostData, VARIANT
> *&Headers, VARIANT_BOOL *&Cancel)
>                 */
>
>                 if( !pDispParams )
>                     return E_INVALIDARG;
>
>                 CComQIPtr<IWebBrowser2, &IID_IWebBrowser2>
> m_spWebBrowser2Tmp;
>                 m_spWebBrowser2Tmp = pDispParams->rgvarg[6].pdispVal;
>
>                 if( m_spWebBrowser2Tmp )
>                 {
>                     // manipulate the browser as needed
>                 }
>                 break;
>
>             case DISPID_NEWWINDOW2:
>                 /*
>                 void NewWindow2(IDispatch **&ppDisp, VARIANT_BOOL
*&Cancel)
>                 */
>
>                 if( !pDispParams )
>                     return E_INVALIDARG;
>
>                 // only allow a new window if SHIFT or CONTROL are held
down
>                 if( ((GetKeyState(VK_SHIFT) & 0x8000) == 0) &&
> ((GetKeyState(VK_CONTROL) & 0x8000) == 0) )
>                     *(pDispParams->rgvarg[0].pboolVal) = VARIANT_TRUE;
>
>                 break;
>
>             case DISPID_ONQUIT:
>                 /*
>                 void OnQuit()
>                 */
>
>                 ManageConnection(false);
>                 break;
>         }
>
>         return S_OK;
>     }
>
>
> Gambit
>
>