Need pointing in the right direction

Hello people,

Just a quick question if you guys wouldn't mind answering or pointing me in
the right direction. How would I go about creating something like the
'ScreenCam' thingy on http://www.xenocoder.co.uk/wordpress/ If you look on
the top right corner of the page there is a little window which displays his
desktop and when clicked upon, opens up a larger window and updates every so
often whilst telling the visitor when it was last updated in minutes. Also,
would anyone know what software was used to grab the desktop after a certain
interval and upload it to a directory?

Many thanks guys.

Sipz