Visual basic 2013 and sql server 2014

Question

now a days I am using visual basic 2013 front end and sql sever back end
I want that when I enter custID on vb form in a textbox and press enter all the relevant record of the entered cutID get display on the respective textbox. Please do help me sen code on my email is [email protected]
I am using the following code:-
Private Sub txtCno_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles
txtCNo.KeyDown
        If e.KeyCode = Keys.Enter Then
            cn.Open()
            Dim cmd As New SqlCommand("SELET * FROM course WHERE cno=" & Val(txtCNo.Text))
            cmd.ExecuteNonQuery()
            cn.Close()
            txtCNo.Text = ""
            txtName.Text = ""
            txtNoDay.Text = ""
        End If
    End Sub

Answer 1

Hi hrjafri,
As the issue is more related to Visual Basic programming, I would like to recommend you post the question in the Visual Basic forum at 
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=vbgeneral . It is appropriate and more experts will assist you.
Additionally, there are a related article and a similar thread for your reference.
How To Use A Database In Your Program
http://bytes.com/topic/net/insights/635615-how-use-database-your-program
Retriving data from sql server into textbox
https://social.msdn.microsoft.com/Forums/vstudio/en-US/f405a590-eda3-454e-a486-f90042c32c48/retriving-data-from-sql-server-into-textbox-using-visual-basic-2008?forum=vbgeneral
Thanks,
Lydia Zhang