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When the user fill the Textbox I want to check his information with the data base if is found I want to tell him Record found before then cancel the lostfocus . Where I can apply this code and how to to that 
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When the user fill the Textbox I want to check his information with the data base if is found I want to tell him Record found before then cancel the lostfocus . Where I can apply this code and how to to that 

Keep Focus On the Specific TextBox

Visual Basic is Microsoft’s event-driven programming language and integrated development environment (IDE) for its Component Object Model (COM) programming model. It is relatively easy to learn and use because of its graphical development features and BASIC heritage. It has been replaced with VB.NET, and is very similar to VBA (Visual Basic for Applications), the programming language for the Microsoft Office product line.