Drop down list synchronization

Hello,

I have created three drop down lists, one for Year, one for Make ("Manufacturer), and one for Model, as pertaining to the Auto Industry.

Each lists has a lookup field (Year, Make and Model Tables)

My problem is how to syncronize data, for example I want to see that each drop down shows only data which is related...is there a way to do VBA code to sychronize all three lists?

I have limited experience with VBA, but can copy and paste code.  

Thanks much
lucyLunaAsked:
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Boyd (HiTechCoach) Trimmell, Microsoft Access MVPDesigner and DeveloperCommented:
What you want to do in commonly know as cascading combo boxes.

Candace Trip  (Utter Angel) has an example

Cascading Combo Boxes Database (Click Here)
Demonstrates how to make combo boxes whose values are filtered by the value of other combo boxes in a cascade.
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Helen FeddemaCommented:
Here is a simple description of linked (cascading) combo boxes:

cboSelectCustomer has tblCustomers as its row source.  Its AfterUpdate event sets cboSelectOrder to Null or "", and requeries cboSelectOrder.
cboSelectOrder has tblOrders as its row source, with a criterion of [Forms]![frmSelectOrder]![cboSelectCustomer]

(and so forth for as many combo boxes as you need)
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lucyLunaAuthor Commented:
Thanks to everyone...I am still working with the options offered, seem like lots of code editing to get this right....I am going to try Helen_Feddema solution....sometime today.

I am looking for something simple..Thanks Helen, I will let you know how your solution works out.

Lucy
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lucyLunaAuthor Commented:
Thanks to all of you....but I am still in the dark about how to solve this problem, when I try to use code provided in solutions...I just get more confused! does anyone have an example related to the auto industry? re-writing code to match my needs is a challenge for my skill level.

Thank again.

Lucy
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lucyLunaAuthor Commented:
I have somewhat found a solution...although I lost over25,000 records, I only have 43 records but, in order to move forward...or until I find a real solution....I would like to know if anyone can help me with "not in list event" my users will have type in the info I lost (25,000 records).

I would like for users to add "year, make and model"  in each respective Combo Box, I am not sure how to go abou this, coding seems a huge challenge to me.

your help is truly appreciated.
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Luke ChungPresidentCommented:
Did you see the paper on the Microsoft Access cascading combo boxes showing the species selection through Kingdom, Phylum, Order, etc.: http://www.fmsinc.com/MicrosoftAccess/Forms/combo-boxes/cascading.html

Here's a paper on creating "Not-In" Outer join queries: http://www.fmsinc.com/MicrosoftAccess/query/outer-join/index.html
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lucyLunaAuthor Commented:
@LukeChung, I was able to find missing records by;

creating one table with ID, Year, Make, Model fields

...then, I did lookup for each of the values on my main form
The form pulls data from main table,

Then I created three combo boxes (year, make, model) on the form...and now I see all records.

However, I need the user to be able to add cars not on the list...I have opened another question for this issue.

Thanks...but the way I configured the Year, Make and Model (as explained above) may not be be set up properly...and I am still waiting for someone to offer a better solution, or to let me know that the way I set it up is fine, and I won't have problems with it.

Lucy
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lucyLunaAuthor Commented:
Thank you very much.
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