Remove users personal data

Hi all,
I'm trying to understand how to remove data my app wrote for different user on the system.
I save some personal settings in Documents ans setting/USERNAME/Application Data/My Dir

So I have a dir for every user, is there a way to retrieve all users "Application Data" folder or should I save in a INI file those directory path and remove in uninstall?

thanks for any tip
bye

You can use EnumUsersReg to do that.