i want to develop  an addin for ppt2003 not ppt2007 with vsto. but i can't find any useful materials for that .
i have tried once. i add  a custom toobar in ppt2003, but when i click the button in the toolbar, the click event only executes 3 times. after 3 times, when pressing it, nothing happens. i wondering....
and begging for help..