Can a customised ribbon in Access 2010 be opened in 2007

If I create a customised ribbon in Access 2010 can this be opened by someone using Access 2010

-- yes. this should be possible

if I use the macro feature in Access 2010, this new feature cannot be opened by someone using access 2007

-- From my understanding access 2007 ribbon should work in access 2010. but not sure viceversa. lets see what others say.

Sorry I typed my question incorrectly.  If I create a customised ribbon in Access 2010 can this be opened by soneone usine Access 2007..  I know the Macro feature doesnt work and wondered if this was the same with the ribbon

Thank you for helping with this, unfortunately I dont have a test machine to work on at present and really need to know this plus I need to know if the ribbon i create in 2010 will be viewable when opened with runtime.  Sorry so many questions but all relateable.

I see there will be issues if you use the access 2010 file in access 2007. Better you save that file in earlier version of access using the save as option. Access 2007 and access 2010 versions are compared here

http://msdn.microsoft.com/en-us/office/cc907897

better compile it for access 2007 version. some more additional discussions here

Hi Peter and Shas, thank you.  I think I have to agree with Peter and better be safe than sorry although it is so frustrating.  Thankyou to everyone else, before I click on Accept as a solution, can I ask about using Access Runtime 2010, are there limitations in using this i.e. would this work instead of Access 2007.  It is a split database with 3 users

Sorry meant to add Peter as well