Hi Bheema, See below image and Try Data Validation and use custom and formula as * =COUNTIF(C:C,C1)=1*
[image: image.png] *Best Regards,* *Venkat * *Chennai* *My Linked in profile <http://in.linkedin.com/pub/venkatesan-c/21/492/a71>* * * On Tue, Sep 6, 2011 at 8:10 PM, Bheema Shankar <shankar.n...@gmail.com>wrote: > I made a userform. linked it with the datasheet. the filenumber acts > as a bridge between userform and datasheet. I have to make the file > number unique in excel. Because the duplicate numbers also accepting > by the datasheet. If it happened so, my intention will not fulfill. > So kindly provide solution to make the filenumber column of the > datasheet as unique. > > -- > > ---------------------------------------------------------------------------------- > Some important links for excel users: > 1. Follow us on TWITTER for tips tricks and links : > http://twitter.com/exceldailytip > 2. Join our LinkedIN group @ http://www.linkedin.com/groups?gid=1871310 > 3. Excel tutorials at http://www.excel-macros.blogspot.com > 4. Learn VBA Macros at http://www.quickvba.blogspot.com > 5. Excel Tips and Tricks at http://exceldailytip.blogspot.com > > To post to this group, send email to excel-macros@googlegroups.com > > <><><><><><><><><><><><><><><><><><><><><><> > Like our page on facebook , Just follow below link > http://www.facebook.com/discussexcel > -- * * * * -- ---------------------------------------------------------------------------------- Some important links for excel users: 1. Follow us on TWITTER for tips tricks and links : http://twitter.com/exceldailytip 2. Join our LinkedIN group @ http://www.linkedin.com/groups?gid=1871310 3. Excel tutorials at http://www.excel-macros.blogspot.com 4. Learn VBA Macros at http://www.quickvba.blogspot.com 5. Excel Tips and Tricks at http://exceldailytip.blogspot.com To post to this group, send email to excel-macros@googlegroups.com <><><><><><><><><><><><><><><><><><><><><><> Like our page on facebook , Just follow below link http://www.facebook.com/discussexcel
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