Visual Basic StopWatch/Timer Wrong?

[jonthedit]

Hi, not sure how this possible but a stopwatch set to 1000
and a timer set to go up 1 second are actually not perfectly in sync!
I know VB is horrible, but for this project it will work fine.
Here is the code and the .exe

Public Class Form1
    Public hit2 As Boolean
    Dim fg As Integer
    Dim songtime As Double
    Dim sw As New Stopwatch
    Private Sub Form1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        'If Not e.Control Then Exit Sub
        Select Case e.KeyCode
            Case Keys.D : HitRight()
            Case Keys.A : HitLeft()
        End Select
    End Sub
    Public Sub HitRight()
        LabelLeft.Text = sw.ElapsedMilliseconds
    End Sub
    Public Sub HitLeft()
        'checknoteintegrity()
        LabelLeft.Text = Format(songtime, "0.00")
    End Sub
    Private Sub Timer2_Tick_1(sender As Object, e As EventArgs) Handles Timer2.Tick
        fg = fg + 1
        LabelRight.Text = fg.ToString
        LabelLeft.Text = sw.ElapsedMilliseconds
    End Sub
 
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Timer2.Start()
        sw.Start()
        Threading.Thread.Sleep(1000)
    End Sub
End Class

Ignore some of the bits about key presses, not needed for now.

download:
https://mega.co.nz/#!RYB1zYbL!tNFtg9kWojt1ASKzKYjRj8uDPKe3JnlL1T6VQpvXA3Q

alt download
http://s000.tinyupload.com/index.php?file_id=95210156442717472759

 

[daxtsu]

There are several problems here:

1. That's not the entire source code, so it won't compile as it is (where are your using (import in vb.net) directives?).
2. Timers (both System.Windows.Forms.Timer and the Stopwatch class) don't need a Sleep function to be called for them, they run when the OS schedules them to, and using Sleep is generally considered bad practice as far as I know.
3. System.Windows.Forms.Timer uses a very inacccurate timer (it can be out of touch with reality by up to +/- 100milliseconds if I recall, so it's not very accurate), while Stopwatch uses the high precision timer available to Windows, so it's not really a surprise if they aren't in perfect sync.