this is code: Dim strSQL As String Dim strCon As String strCon = "Data Source=NITHI;Initial Catalog=master;Integrated Security=True" Dim cmdBackup As SqlClient.SqlCommand = New SqlClient.SqlCommand Cursor = Cursors.WaitCursor Try strSQL = "BACKUP DATABASE Northwind " strSQL &= "TO DISK = 'G:\mybackup.bak' " strSQL &= "WITH FORMAT, " strSQL &= "NAME = 'myBackup'" cmdBackup.Connection = conn cmdBackup.CommandText = strSQL cmdBackup.ExecuteNonQuery() MsgBox("finish") Catch ex ...