add userform to excel 2007 to return result - tricky

Hi Experts

I need a userform front end to open up only (end user not to see back end data worksheet in excel)...the excel workbook is to be used by several people at the same time....if this can be done in 2007...

so when the user clicks the excel 2007 file from their desktop the workbook opens with userform, no worksheets visible - the resource then types in customer account number in first field and the result is displayed in the second field. ..

userform to have close and save userform/workbook button..to close down workbook...

so spreadsheet 1
column A.                    column B.
Account Number.     Organisation Name
1334788.                     RBC
4677883.                     Bank of New York

in total I have 450,000 rows of data....
route217Asked:
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EirmanConnect With a Mentor Chief Operations ManagerCommented:
Excel is not designed for simultaneous network access. I think you would be much much better off using microsoft access. You can perform a lot of data manipulation and extraction there using crosstab queries and pivot tables. You can export to excel if needed.

For multiple users store all the data in tables in a database on the server (usually called the back end database) and put your forms in a database (front end database) on each users machine. Just link the each front end to the tables on the backend database. This way you can have dozens of users simultaneously accessing the data.
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Patrick MatthewsConnect With a Mentor Commented:
>>the excel workbook is to be used by several people at the same time

I strongly urge you not to do that.

:)
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route217Author Commented:
Hi Experts

firstly thanks for the feedback...

I well store/add the workbook on different computers. ..so each user has their own version....

but original question remains....regard s
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route217Author Commented:
hi experts

Any ideas. .........using excel.......
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route217Author Commented:
would you like me to break the question down into two parts??
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route217Author Commented:
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