Prasant2expert: First are you aware that
VB.NET is only part of the much larger picture, .NET Framework? Second, WROX has the Books, Sample codes for their books and this forum. Third, for
VB.NET look at Beginning
VB.NET 2nd Edition, this addresses your questions. The textbook is well designed with te Programmer in mind. It introduces you to Object-Oriented Programming, building and creating Objects, Encapsulation, Polymorphism and ADO.NET (also member of the .NET Framework), just to name a few. At
www.wrox.com, go to Browse Books.
Hope this helps.