往IE中嵌入工具条

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.pas

unit BandUnit;

interface

uses
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;
implementation

uses 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;

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。

补充：软件开发 , Delphi ,