How to get started writing iCal plugins?

I'd like to write an iCal开发者_StackOverflow plugin to help me cope with the need to put most events I create onto two calendars. Google is uncharacteristically less than helpful in providing programming resources for this purpose. Can someone here provide pointer(s)?

You might consider using the Apple Events scripting interface built into iCal (and many other OS X apps), accessible via AppleScript or scripting bridges such as appscript. Use the Open Dictionary menu item in AppleScript Editor.app (as it is now known in OS X 10.6) to view the complete iCal scripting dictionary. There is a somewhat old but probably still useful introduction to iCal scripting here.