connect_closure

Description:

public static ulong connect_closure (void* instance, string detailed_signal, Closure closure, bool after)

Connects a closure to a signal for a particular object.

instance	the instance to connect to.
detailed_signal	a string of the form "signal-name:`:detail`".
closure	the closure to connect.
after	whether the handler should be called before or after the default handler of the signal.

the handler ID (always greater than 0 for successful connections)