Hiding Running Apps in Docks

[icedd]

Yes, it seems stupid, but:

How do I hide an icon on the dock, while still keeping the application running?

Do I have to "Open at Login"? Or what?

Thanks for any help given.

 

[Jisuo]

Press CMD+H

 

[sammich]

I think that the OP is asking to make the icon not appear in the dock.

http://homepage.mac.com/fahrenba/programs/dockless/dockless.html