VB.Net连接(VB.Net connection)

 我正在慢慢转换到VB.Net，看起来最简单的东西是完全不同的。 我试图连接到SQL Server，只是抓住一些数据。 我测试了连接，并没有问题。 现在我试图简单地从服务器中选择一些数据，并在Msgbox中显示第一个名字（或任何有关此事的信息）。 这是我到目前为止的代码.... 
 
Imports System.Data
Imports System.Data.SqlClient

Public Class Form1
    Public conn As New SqlConnection("data source=Tuys1;initial catalog=DDDBuyer; user ID=userID; password=password")
    Private dA As New SqlDataAdapter("Select FirstName, LastName from tblBuyers where Buyerid=1473", conn)
    Private dS As New DataSet
End Class
 
 我不确定如何从这里出发......我知道有这样的事情 
 
.hasRows

if ds.hasrows then
   msgbox = "HELLO"
End if
 
 或者像在txtFirstName中显示名字一样 
 
 我试图弄清楚它是如何工作的，经过一些研究后，很难找到一个能够帮助我完成我想要完成的具体示例。 

I'm slowly transitioning to VB.Net and it seems like the simplest of things are completely different. I'm trying to do a connection to SQL Server and just grab some data. I've tested the connection and it's fine. Now I'm trying to simply select some data from the server and display the first name in the Msgbox (or anything for that matter). Here is the code I've gotten so far....
 
Imports System.Data
Imports System.Data.SqlClient

Public Class Form1
    Public conn As New SqlConnection("data source=Tuys1;initial catalog=DDDBuyer; user ID=userID; password=password")
    Private dA As New SqlDataAdapter("Select FirstName, LastName from tblBuyers where Buyerid=1473", conn)
    Private dS As New DataSet
End Class
 
I'm not really sure how to go from here... I understand there is something like 
 
.hasRows

if ds.hasrows then
   msgbox = "HELLO"
End if
 
or something like displaying the FirstName in txtFirstName
 
I am trying to get an idea of how ths works and after some research it's hard to find a specific example that would help me do what I'm trying to accomplish.