I have started to use Windows 7. Programs can be "pinned" to the Taskbar. Internet Exporer was pinned there after installation, and when I start Internet Explorer no other icon is added to the Taskbar. I installed Google Chrome, it had the same behaviour on the Taskbar.
But now I have installed Eclipse and Spotify. I can pin them to the Taskbar, but when I click on them and start them the running program is shown as an additional icon. How can I make so they have the same behaviour as Internet Explorer and Google Chrome?