Connect shared SQL Server via Lan Network in ASP.Net

hello sir/maam

how to connect the client or share microsoft sql server via lan based

this is my code

Public constr As String = "Data Source=DESKTOP-7D0VQRL\SQLEXPRESS;Initial Catalog=db_sis;Integrated Security=True"
Public ultracon As New MySqlConnection(constr)
Sub ramcon()
    If ultracon.State = ConnectionState.Closed Then
        ultracon.Open()
    Else
    End If

appreciate your help to this problem

Thank you and Best Regards