how to connect a vb.net form to microsoft sql server database in coding?
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If you are connecting to a SQL server instance on your own (trusted) computer you can use
Dim con As New SqlConnection("Server=.\SQLEXPRESS;Database=PUBS;Trusted_Connection=yes;")
If you have installed SQLEXPRESS then the above connection string is sufficient. Just replace PUBS with the appropriate database name. If you need other strings you can find them here