I am an Excel novice so please be patient!
My problem is this-
I have a drop down list set up in D2 in worksheet 1 which references a list
of customers contained in column A in worksheet 2. When the selection is
made
in D1, sheet 1 it returns a contract number in E2 from column B in sheet 2
using VLOOKUP funtion (and so on down the sheet). As the enteries in sheet 2
Col A are not a definitive list of possible customers, nor are the contract
number in Col B a definitive list of job numbers that may be associated with
a particular customer, the user can enter their own values into Sheet 1, D2
and E2.
Pretty staight forward so far!
What I would like to happen would be 1 of 2 possibilities
1- If the user enters a customers name and job number that does not appear
in sheet 2 col A and B, the entries will be added to the relavant columns
for
selection in the future.
2- If the user enters a customers name that does exist in Col A sheet 2, but
ammends the job number (we use 1 type of job number for a contract and
another for one off specific jobs) that number is some how added to a list
of
job numbers for that customer and when that customer is select in the
future,
further down the sheet, all associated numbers appear in another drop down
list.
A solution to 1 would be great, but a solution to 2 would be superb( I
appreciate it may be way out of my depth) and score me loads of points with
the boss.
I've noticed, whilst trawling through loads of postings seraching for an
answer, that people have posted specific solution based on the posteractual
worksheet, so if any one kind enough to profer any solutions needs more info
I will do my best to come up with the goods.

Thanks in advance