how to handle idle time

[Jim Crafton <jim crafton verizon net>]

Hi,
I am trying to figure out the right way to handle idle time handling, so 
that my functions can get called but not use 100% of CPU
Currently i am doing the following:

after gtk_init() has been called (but before gtk_main)


   g_idle_add( GTKUIToolkit::internal_gdkIdleHandler, 
(gpointer)UIToolkit::getDefaultUIToolkit() );


and internal_gdkIdleHandler is implemented as :

gboolean GTKUIToolkit::internal_gdkIdleHandler(gpointer data)
{
 //my code here-  currently doesn't doo much of anything
   return TRUE;
}

The program runs OK but the CPU usage is at 100%. This happens on Win32. 
Is there something I am doing wrong ?

Also what is the right way to handle events to gracefully close the app 
down?

Thanks !

Jim