about two problems of signal

[=?big5?b?tsC8eSBLYXNvbiBIdWFuZw==?= <kasonhuang kinposh com cn>]

Title: about two problems of signal

Hi all:

1. i meet a problem about GtkSignalMarshaller .

    i don't know why gtk need the Marshaller.

    or  you can tell me what is the function of the Marshaller in the processing 
    of  emitting  a signal to the widget.

2. if someone knows the detail processing of the gtk_signal_real_emit(....) API
      and can you tell me how gtk use the API to emit a signal to a widget ?

thanks in advance!

kason