How to backup database SQL SERVER from VB NET?

Besides using SQL-DMO as Suprotim said, you also can use SQL commands to backup and restore SQL Server database.

Code Block

Imports System.Data.SqlClient

Public Class Form1

    Dim con As SqlConnection

    Dim cmd As SqlCommand

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        con = New SqlConnection("Data Source=localhost;Integrated Security=SSPI;Initial Catalog=DBNAME")

    End Sub

    ' Backup

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        cmd = New SqlCommand("backup database DBNAME to disk='\\server\path\filename.bak'", con)

        con.Open()

        cmd.ExecuteNonQuery()

        con.Close()

    End Sub

    ' Restore

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        cmd = New SqlCommand("restore database DBNAME from disk='\\server\path\filename.bak'", con)

        con.Open()

        cmd.ExecuteNonQuery()

        con.Close()

    End Sub

End Class

Please check this thread for detail:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2568063&SiteID=1