This type ahead functionality is not available in excel. I tried to this about 
2 years back and was stuck in the same situation as you are. The only 
workaround is to have a search cell with a macro that can change the drop downs 
for another cell. The superset of values can be placed in a hidden column or 
column in a hidden sheet. But this will also be cumbersome to the users. 

Sent from my iPhone

> On Apr 25, 2015, at 7:00 AM, Pratik Thaker 
> <[email protected]> wrote:
> 
> Hi Mark,
> 
> User will select the value from list only. It's just that user should be able 
> to type in the cell and the list should be narrowed down as per user's input 
> (like usual comboboxes of web UI)
> 
> Right now user has to select the value by scrolling through whole list.
> 
> Regards,
> Pratik Thaker
> 
> -----Original Message-----
> From: Mark Beardsley [mailto:[email protected]]
> Sent: Saturday, April 25, 2015 4:18 PM
> To: [email protected]
> Subject: RE: Typable dropdown in excel file (XLSX)
> 
> Can I make sure that I am clear what you want?
> 
> Are you asking whether it is possible to create a drop down list that will 
> change dynamically as the user enters something into a cell? If so, then I do 
> not believe that this is possible; according to Microsoft, a data validation 
> can only be used for the following -
> 
> /    * Make a list of the entries that restricts the values allowed in a
> cell.
>    * Create a prompt message explaining the kind of data allowed in a cell.
>    * Create messages that appear when incorrect data has been entered.
>    * Check for incorrect entries by using the Auditing toolbar.
>    * Set a range of numeric values that can be entered in a cell.
>    * Determine if an entry is valid based on calculation in another cell.
> /
> (https://support.microsoft.com/en-us/kb/211485)
> 
> If you do know of a way this can be accomplished using Excel directly, can I 
> ask you to post the instructions here please? That way, someone can have a go 
> at re-creating these steps with POI and help you that way.
> 
> 
> 
> --
> View this message in context: 
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> Sent from the POI - User mailing list archive at Nabble.com.
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