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I have made a program in VB with Access as back end. In the data base there are three fields which are unique id of a person. I want to display "Already Exist" message box when i enter an already existing id. matching all three fields and not allow duplicate entry.
Visual basic with Access as back end[Br _extended="true" />
Can anyone tell me what codes should be used for this.
January 13, 2010 4:27 PM
January 15, 2010 8:55 AM