Standard function for a skin's "minimize" button at present is minimize both main window (control panel) and movie window to task bar (but movie will not be paused).
Seigo has very confusingly attached a non-standard command to the "minimize"-button of his (16Feb2006) MC-2 skin (i.e. the "Show/Hide Main menu"-command, which is the same as depressing key [H]
(default keydefinition)) .
However, the skin you mentioned also has a "Boss-button". So if you define the "Boss button" as
Tizio explained you earlier, clicking on that button (i.e. the button like a dice with five dots just left of the volume slider) will execute the Boss-commands as defined by you.