这个程序错在哪里？在IE中加入工具条！

Question

我们首先要建立一个ActiveX Library。将其保存为MailIEBand.Dpr；然后建立一个COM Object，
将其保存为BandUnit.pas；然后建立一个Form，这个窗口将作为子窗口显示在IE工具栏中，
将窗口的BorderStyle属性改为bsNone，添加一个TButton组件和一个TComboBox组件，
将TButton的Caption属性改为获取全部，然后将窗口文件其保存为IEForm.pas。
在BandUnit中，需要建立一个实现上面提到的接口的TComObject对象。如下：
TGetMailBand = class(TComObject, IDeskBand, IObjectWithSite, IPersistStreamInit)另外由于需要在COM服务器注册时添加一些注册表信息，所以还需要建立一个继承自TComObjectFactory类的对象，
在对象的UpdateRegistry事件中编写代码添加附加的注册表信息。
下面的程序清单1-6到1-8是实现COM服务器的全部程序代码：
程序下面如：

Answer 1

程序清单1-6 MailIEBand.dpr
library MailIEBand;uses
  ComServ,
  BandUnit in 'BandUnit.pas',
  IEForm in 'IEForm.pas' {Form1},
  MailIEBand_TLB in 'MailIEBand_TLB.pas';exports
  DllGetClassObject,
  DllCanUnloadNow,
  DllRegisterServer,
  DllUnregisterServer;{$R *.TLB}{$R *.RES}begin
end.程序清单1-7 BandUnit.pasunit BandUnit;interfaceuses
  Windows, Sysutils, Messages, Registry, Shellapi, ActiveX, Classes, ComObj,
   Shlobj, Dialogs, Commctrl,ShDocVW,IEForm;type
  TGetMailBand = class(TComObject, IDeskBand, IObjectWithSite, IPersistStreamInit)
  private
      frmIE:TForm1;
      m_pSite:IInputObjectSite;
    m_hwndParent:HWND;
    m_hWnd:HWND;
    m_dwViewMode:Integer;
      m_dwBandID:Integer;
   protected   public
    {Declare IDeskBand methods here}
      function GetBandInfo(dwBandID, dwViewMode: DWORD; var pdbi: TDeskBandInfo):
         HResult; stdcall;
      function ShowDW(fShow: BOOL): HResult; stdcall;
      function CloseDW(dwReserved: DWORD): HResult; stdcall;
      function ResizeBorderDW(var prcBorder: TRect; punkToolbarSite: IUnknown;
         fReserved: BOOL): HResult; stdcall;
      function GetWindow(out wnd: HWnd): HResult; stdcall;
      function ContextSensitiveHelp(fEnterMode: BOOL): HResult; stdcall;      {Declare IObjectWithSite methods here}
      function SetSite(const pUnkSite: IUnknown ):HResult; stdcall;
      function GetSite(const riid: TIID; out site: IUnknown):HResult;stdcall;      {Declare IPersistStream methods here}
      function GetClassID(out classID: TCLSID): HResult; stdcall;
      function IsDirty: HResult; stdcall;
      function InitNew: HResult; stdcall;
      function Load(const stm: IStream): HResult; stdcall;
      function Save(const stm: IStream; fClearDirty: BOOL): HResult; stdcall;
      function GetSizeMax(out cbSize: Largeint): HResult; stdcall;
  end;const
  Class_GetMailBand: TGUID = '{954F618B-0DEC-4D1A-9317-E0FC96F87865}';
  //以下是系统接口的IID
  IID_IUnknown: TGUID = (
      D1:$00000000;D2:$0000;D3:$0000;D4:($C0,$00,$00,$00,$00,$00,$00,$46));
  IID_IOleObject: TGUID = (
      D1:$00000112;D2:$0000;D3:$0000;D4:($C0,$00,$00,$00,$00,$00,$00,$46));
  IID_IOleWindow: TGUID = (
      D1:$00000114;D2:$0000;D3:$0000;D4:($C0,$00,$00,$00,$00,$00,$00,$46));  IID_IInputObjectSite : TGUID = (
      D1:$f1db8392;D2:$7331;D3:$11d0;D4:($8C,$99,$00,$A0,$C9,$2D,$BF,$E8));
  sSID_SInternetExplorer : TGUID = '{0002DF05-0000-0000-C000-000000000046}';
  sIID_IWebBrowserApp : TGUID= '{0002DF05-0000-0000-C000-000000000046}';  //面板所允许的最小宽度和高度。
  MIN_SIZE_X = 54;
  MIN_SIZE_Y = 22;
  EB_CLASS_NAME = 'GetMailAddress';
implementationuses ComServ;
function TGetMailBand.GetWindow(out wnd: HWnd): HResult; stdcall;
begin
   wnd:=m_hWnd;
   Result:=S_OK;
end;function TGetMailBand.ContextSensitiveHelp(fEnterMode: BOOL): HResult; stdcall;
begin
   Result:=E_NOTIMPL;
end;function TGetMailBand.ShowDW(fShow: BOOL): HResult; stdcall;
begin
   if m_hWnd<>0 then
      if fShow then
         ShowWindow(m_hWnd,SW_SHOW)
      else
         ShowWindow(m_hWnd,SW_HIDE);
   Result:=S_OK;
end;function TGetMailBand.CloseDW(dwReserved: DWORD): HResult; stdcall;
begin
   if frmIE<>nil then
      frmIE.Destroy;
   Result:= S_OK;
end;function TGetMailBand.ResizeBorderDW(var prcBorder: TRect;
      punkToolbarSite: IUnknown;fReserved: BOOL): HResult; stdcall;
begin
   Result:=E_NOTIMPL;
end;
//接下面

Answer 2

function TGetMailBand.SetSite(const pUnkSite: IUnknown):HResult;stdcall;
var
   pOleWindow:IOleWindow;
   pOLEcmd:IOleCommandTarget;
   pSP:IServiceProvider;
   rc:TRect;
begin
   if Assigned(pUnkSite) then begin
      m_hwndParent := 0;      m_pSite:=pUnkSite as IInputObjectSite;
      pOleWindow := PunkSIte as IOleWindow;
      //获得父窗口IE面板窗口的句柄
      pOleWindow.GetWindow(m_hwndParent);      if(m_hwndParent=0)then begin
         Result := E_FAIL;
         exit;
      end;      //获得父窗口区域
      GetClientRect(m_hwndParent, rc);      if not Assigned(frmIE) then begin
         //建立TIEForm窗口，父窗口为m_hwndParent
         frmIE:=TForm1.CreateParented(m_hwndParent);         m_Hwnd:=frmIE.Handle;         SetWindowLong(frmIE.Handle, GWL_STYLE, GetWindowLong(frmIE.Handle,
            GWL_STYLE) Or WS_CHILD);
         //根据父窗口区域设置窗口位置
         with frmIE do begin
            Left :=rc.Left ;
            Top:=rc.top;
            Width:=rc.Right - rc.Left;
            Height:=rc.Bottom - rc.Top;
         end;
         frmIE.Visible := True;         //获得与浏览器相关联的Webbrowser对象。
         pOLEcmd:=pUnkSite as IOleCommandTarget;
         pSP:=pOLEcmd as  IServiceProvider;         if Assigned(pSP)then begin
           pSP.QueryService(IWebbrowserApp, IWebbrowser2,frmIE.IEThis);
         end;
      end;
   end;   Result := S_OK;
end;function TGetMailBand.GetSite(const riid: TIID; out site: IUnknown):HResult;stdcall;
begin
   if Assigned(m_pSite) then result:=m_pSite.QueryInterface(riid, site)
   else
     Result:= E_FAIL;
end;function TGetMailBand.GetBandInfo(dwBandID, dwViewMode: DWORD; var pdbi: TDeskBandInfo):
      HResult; stdcall;
begin
   Result:=E_INVALIDARG;
   if not Assigned(frmIE) then frmIE:=TForm1.CreateParented(m_hwndParent);
   if(@pdbi<>nil)then begin
      m_dwBandID := dwBandID;
      m_dwViewMode := dwViewMode;      if(pdbi.dwMask and DBIM_MINSIZE)<>0 then begin
         pdbi.ptMinSize.x := MIN_SIZE_X;
         pdbi.ptMinSize.y := MIN_SIZE_Y;
      end;      if(pdbi.dwMask and DBIM_MAXSIZE)<>0 then begin
         pdbi.ptMaxSize.x := -1;
         pdbi.ptMaxSize.y := -1;
      end;      if(pdbi.dwMask and DBIM_INTEGRAL)<>0 then begin
         pdbi.ptIntegral.x := 1;
         pdbi.ptIntegral.y := 1;
      end;      if(pdbi.dwMask and DBIM_ACTUAL)<>0 then begin
         pdbi.ptActual.x := 0;
         pdbi.ptActual.y := 0;
      end;      if(pdbi.dwMask and DBIM_MODEFLAGS)<>0 then
         pdbi.dwModeFlags := DBIMF_VARIABLEHEIGHT;      if(pdbi.dwMask and DBIM_BKCOLOR)<>0 then
         pdbi.dwMask := pdbi.dwMask and (not DBIM_BKCOLOR);
   end;
end;
function TGetMailBand.GetClassID(out classID: TCLSID): HResult; stdcall;
begin
   classID:= Class_GetMailBand;
   Result:=S_OK;
end;function TGetMailBand.IsDirty: HResult; stdcall;
begin
   Result:=S_FALSE;
end;function TGetMailBand.InitNew: HResult;
begin
  Result := E_NOTIMPL;
end;function TGetMailBand.Load(const stm: IStream): HResult; stdcall;
begin
   Result:=S_OK;
end;function TGetMailBand.Save(const stm: IStream; fClearDirty: BOOL): HResult; stdcall;
begin
   Result:=S_OK;
end;function TGetMailBand.GetSizeMax(out cbSize: Largeint): HResult; stdcall;
begin
   Result:=E_NOTIMPL;
end;
//TIEClassFac类实现COM组件的注册
type
   TIEClassFac=class(TComObjectFactory) //
   public
      procedure UpdateRegistry(Register: Boolean); override;
   end;procedure TIEClassFac.UpdateRegistry(Register: Boolean);
var
  ClassID: string;
  a:Integer;
begin
   inherited UpdateRegistry(Register);
   if Register then begin
     ClassID:=GUIDToString(Class_GetMailBand);
     with TRegistry.Create do
       try
         //添加附加的注册表项
         RootKey:=HKEY_LOCAL_MACHINE;
         OpenKey('\SOFTWARE\Microsoft\Internet Explorer\Toolbar',False);
         a:=0;
         WriteBinaryData(GUIDToString(Class_GetMailBand),a,0);
         OpenKey('\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved',True);
         WriteString (GUIDToString(Class_GetMailBand),EB_CLASS_NAME);
         RootKey:=HKEY_CLASSES_ROOT;
         OpenKey('\CLSID\'+GUIDToString(Class_GetMailBand),False);
         WriteString('',EB_CLASS_NAME);
       finally
         Free;
       end;
   end
   else begin
      with TRegistry.Create do
      try
         RootKey:=HKEY_LOCAL_MACHINE;
         OpenKey('\SOFTWARE\Microsoft\Internet Explorer\Toolbar',False);
         DeleteValue(GUIDToString(Class_GetMailBand));
         OpenKey('\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved',False);
         DeleteValue(GUIDToString(Class_GetMailBand));
      finally
         Free;
      end;
   end;
end;initialization
   TIEClassFac.Create(ComServer, TGetMailBand, Class_GetMailBand,
      'GetMailAddress', '', ciMultiInstance, tmApartment);
end.
//接下面

Answer 3

这里不写出来了，还是在网上看吧。地址：
http://www.atnb.com/1/ie.txt

Answer 4

參考<<delphi 深度探索>>II吧