Delphi中WebBrowser拦截网页Alert对话框消息(转)

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, OleCtrls, SHDocVw, ActiveX;

type
IDocHostShowUI = interface(IUnknown)
['{c4d244b0-d43e-11cf-893b-00aa00bdce1a}']
function ShowMessage(hwnd: THandle; lpstrText: POLESTR; lpstrCaption: POLESTR;dwType: longint; lpstrHelpfile: POLESTR; dwHelpContext: longint;var plResult: LRESULT): HRESULT; stdcall;
function ShowHelp(hwnd: THandle; pszHelpfile: POLESTR; uCommand: integer;dwData: longint; ptMouse: TPoint; var pDispatchObjectHit: IDispatch): HRESULT; stdcall;
end;

TWebBrowser = class(SHDocVw.TWebBrowser,IDocHostShowUI)
protected
function ShowMessage(hwnd: THandle; lpstrText: POLESTR; lpstrCaption: POLESTR;dwType: longint; lpstrHelpfile: POLESTR; dwHelpContext: longint;var plResult: LRESULT): HRESULT; stdcall;
function ShowHelp(hwnd: THandle; pszHelpfile: POLESTR; uCommand: integer;dwData: longint; ptMouse: TPoint; var pDispatchObjectHit: IDispatch): HRESULT; stdcall;
end;

type
TForm1 = class(TForm)
WebBrowser1: TWebBrowser;
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

{ TWebBrowser }

function TWebBrowser.ShowHelp(hwnd: THandle; pszHelpfile: POLESTR; uCommand,
dwData: Integer; ptMouse: TPoint; var pDispatchObjectHit: IDispatch): HRESULT;
begin
Result := S_FALSE;
end;

function TWebBrowser.ShowMessage(hwnd: THandle; lpstrText,
lpstrCaption: POLESTR; dwType: Integer; lpstrHelpfile: POLESTR;
dwHelpContext: Integer; var plResult: LRESULT): HRESULT;
begin
//plResult := MessageBoxW(hwnd,PWChar(lpstrText),'Title',64);//这里屏蔽了alert
Result := S_OK;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
WebBrowser1.Navigate('E:/alert.htm');
end;

end.