What is this application and how to even start to create like this ?

[chennaiprogrammer]

I had posted this earlier at the VB6 forum but now Im posting it here

I have working knowledge of vb6 and c#


Please choose "member sign in " on the page

http://www.shutterfly.com/

sign in using

aldenviv@gmail.com / 123456

Please click on "add pictures"

Create a album "My first album"

Then click on "Next"

and again please click on "choose pictures"

Now You will find an excellent multiple file upload application

Is this activex ? If so why no warnings came up in my browser etc since if it is activex normally we get a

browser warning saying that the application is dangerous to open etc

Nor did I get any java applet warnings too ?

Nor is it flash ?

So really how they have done it ?

Should this be done using C# or vb6 ?

How can I learn more about creating something like this which ties up with Internet explorer so neatly ?

So what is this application ? and can I find any sample code for STARTING to create an application like this

?

I know this is a complicated large application. All I want to know is how to start creating such an application?

Please advise any help will be greatly appreciated