Making controls for web pages

I see that with Visual Studio.NET one can't make any ActiveX controls for web pages.

I am aware that ActiveX is no longer allowed to be created by VS.NEt, but I'm wondering what is Microsoft's replacement for ActiveX controls in web browsers?

How can one get activex-like functionality in a web page now?

You can still use legacy ActiveX controls using the <%Page %> ASPCOMPAT attribute set to true.

But, no, you don't develop ActiveX controls in VS .Net. Depending on your requirements for your control, you should be able to get by using the supplied server controls, or inheriting from them and building composite or custom controls, or building your own (eek) from a mix of html and server side code, or using a Windows Forms UserControl which acts as a .Net applet inside the client's browser (requires framework is installed on client's machine).