Waiting until loop finished.

>>>Start learning VB 2005 EE and made a kind of Timing program.

>>>Tried to show a text during time-call but it comes up only after the loop
>>>is
>>>finished.
>>>(TextBox2 in Sub Button1_Click)
>>>I do not understand why.
>>>Cannot find it either on internet.
>>>Please can anyone explain to me the reason.
>>>Here the code so far:
>>>Public Class Form1
>>>
>>>Dim Uitlezing As Single = 0
>>>
>>>Dim Inlezing As Single = 0
>>>
>>>Dim BeginTime As Double = 0
>>>
>>>Dim FinishTime As Double = 0
>>>
>>>Dim ElapsedTime As Single = 0
>>>
>>>Dim Wachttijd As Single = 5
>>>
>>>Dim Wachttext As String = ""
>>>
>>>Dim TotalTime As Single = 0
>>>
>>>Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
>>>System.EventArgs) Handles Button1.Click
>>>
>>>
>>>
>>>TextBox2.Text = "Program Runs"
>>>
>>>Call InitializeTimer(Uitlezing, Wachttijd)
>>>
>>>Inlezing = Uitlezing
>>>
>>>Uitlezing = 0
>>>
>>>TextBox1.Text = "Waiting Time was" & " " & Str(Inlezing) & " Seconds."
>>>
>>>
>>>
>>>End Sub
>>>
>>>
>>>
>>>Private Sub InitializeTimer(ByRef Uitlezing As Single, ByRef Wachttijd As
>>>Single)
>>>
>>>ElapsedTime = 0
>>>
>>>BeginTime = Microsoft.VisualBasic.DateAndTime.Timer
>>>
>>>Do While ElapsedTime < Wachttijd
>>>
>>>FinishTime = Microsoft.VisualBasic.DateAndTime.Timer
>>>
>>>ElapsedTime = (FinishTime - BeginTime)
>>>
>>>Loop
>>>
>>>Uitlezing = ElapsedTime
>>>
>>>End Sub
>>>
>>>
>>>
>>>
>>>
>>>Private Sub Wait_Click(ByVal sender As System.Object, ByVal e As
>>>System.EventArgs) Handles Wait.Click
>>>
>>>
>>>
>>>Wachttext = MaskedTextBox1.Text
>>>
>>>Wachttijd = Single.Parse(Wachttext)
>>>
>>>Call InitializeTimer(Uitlezing, Wachttijd)
>>>
>>>TotalTime = Inlezing + Uitlezing
>>>
>>>TextBox2.Text = "Total Time is" & " " & Str(TotalTime) & " " & "Seconds"
>>>
>>>
>>>End Sub
>>>
>>>
>>>End Class
>>>
>>>Many thanks,
>>>Arie
>>>