SQL Result to Global Variable - vb.net

Question

Within my MDIParent Me_Load I have an SQL query that returns user information based upon Windows ID. This works well, however I'd really like to move this logic out into perhaps a module and assign each value in the db to a global variable to be used elsewhere. I'd like to be able to access the contact_id in any child form of the parent MDI. I'm used to PHP where I'd just assign it to a session variable that I could reference anywhere.
This is my current SQL Code
Dim sql_query As String
Dim errorMessages As New StringBuilder()
Dim cnn = ConfigurationManager.ConnectionStrings("sql_connection_string").ConnectionString
Dim adapter As SqlDataAdapter
Dim ds As New DataTable()
Dim User_ID As String
Dim User_First_Name As String
Dim User_Last_Name As String
Dim User_Contact_CD As String
Dim User_Login As String
sql_query = "SELECT Contact_ID, First_Name_CH, Last_Name_CH, Contact_CD, Login_VC FROM [Worktool].[dbo].[vwEmployees_T] WHERE Login_VC = '" & username & "'"
Using connection As New SqlConnection(cnn)
Try
If connection.State = ConnectionState.Closed Then connection.Open()
adapter = New SqlDataAdapter(sql_query, connection)
adapter.Fill(ds)
User_ID = ds.Rows(0)("Contact_ID").ToString()
User_First_Name = ds.Rows(0)("First_Name_CH").ToString()
User_Last_Name = ds.Rows(0)("Last_Name_CH").ToString()
User_Contact_CD = ds.Rows(0)("Contact_CD").ToString()
User_Login = ds.Rows(0)("Login_VC").ToString()
connection.Close()
Catch ex As SqlException
MsgBox("Sorry, there was an issue with the connection. Please try again ! ")
Dim i As Integer
For i = 0 To ex.Errors.Count - 1
errorMessages.Append("Index #" & i.ToString() & ControlChars.NewLine _
& "Message: " & ex.Errors(i).Message & ControlChars.NewLine _
& "LineNumber: " & ex.Errors(i).LineNumber & ControlChars.NewLine _
& "Source: " & ex.Errors(i).Source & ControlChars.NewLine _
& "Procedure: " & ex.Errors(i).Procedure & ControlChars.NewLine)
Next i
MsgBox(errorMessages.ToString())
End Try
End Using
'Assign messages
main_window_welcome.Text = "Welcome back, " & Replace(User_First_Name, " ", "") & " " & Replace(User_Last_Name, " ", "")
variable username is
Public username = Environ$("Username")

Answer 1

You've declared the 4 variables in the class and they are private to that class. At this point your code works. Hilight those 4 variable declarations and Cut them. Your code shows errors because you just removed the declarations.
Add a module to your solution (name it what you want)
paste the declarations into the module body.
change the Dim to Public.
Your errors disappear.
Your variables are now public and available throughout your solution.