Wix Custom Actions

This is just for reference

http://www.codeproject.com/KB/install/wixcustomaction.aspx
http://stackoverflow.com/questions/5659364/perform-custom-action-based-on-mode-wix
http://stackoverflow.com/questions/320921/how-to-add-a-wix-custom-action-that-happens-only-on-uninstall-via-msi