How do I automate graphs in excel from access? any tutorials? sample codes/applications??

i have an application in access and i want the users to be able to generate graphs based on thier input(date range.. etc)... the graphs should be generated in excel... and saved to a defined path or open for them to view... then they can either print the graphs or save it.

there are many different types of graphs... using data from different tables.

THANKS!!
ANY HELP IS APPRECIATED!