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//试试这样的格式
function getButton(const Ptr: Pointer): Boolean;
var
btn: TButton;
begin
btn := TButton(Ptr); //将指针强制转换成TButton
ShowMessage(btn.Caption);
end;
uses mshtml;
{$R *.dfm}
function get_cookie(webobj:TWebbrowser):string;
begin
if (webobj = nil) or (webobj.Document = '') then
exit('');
get_cookie := (webobj.Document as IHTMLDocument2).cookie;
end;
procedure TForm2.Button1Click(Sender: TObject);
begin
caption := get_cookie(WebBrowser1);
end;
procedure TForm2.FormCreate(Sender: TObject);
begin
WebBrowser1.Navigate('http://www.baidu.com');
end;