uses MSHtml;

//在控件标签additional中找到TApplicationEvents控件，拖到窗体上．在TApplicationEvents的OnMessage事件中加入以下代码：

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG;
var Handled: Boolean);
begin
if (Msg.message = wm_rbuttondown) or (Msg.message = wm_rbuttonup) or
(msg.message = WM_RBUTTONDBLCLK) then
begin
if IsChild(Webbrowser1.Handle, Msg.hwnd) then
Handled := true;//如果有其他需要处理的，在这里加上你要处理的代码
end;
end;