switchen wireless <-> wired

[t221nk]

Dear all,

At my work we're use wired and wireless network connections.
Now i'm looking for a tool/handling/applicarion that set the preferred connection.

Let me give an example:

when i'm at my desk (an the wired cable is in), all network traffic should use this network device.
When i'm walking trough the firm (and there is no wired connection) then the pc should only use his wireless network device.... only in this cases.


I'm looking for this for a long time, so please help

THANKS in advace