[VB.NET] Moving a form

[todd]

I have a timer to move a form up frmNotification.Height in ShowTime milliseconds..

   Private WithEvents tmrTimer As New System.Windows.Forms.Timer

... (called in a function)
        tmrTimer.Interval = Math.Floor(ShowTime / frmNotification.Height)
        tmrTimer.Enabled = True
...

    Private Sub tmrTimer_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles tmrTimer.Tick
        frmNotification.Top -= 1
        If (frmNotification.Top = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height - frmNotification.Height - 28) Then
            tmrTimer.Enabled = False
        End If
    End Sub

But it goes very slow no matter what the timer is set at.. is there another way I could move it up without blocking (a loop in another thread maybe?) or do I have to use some kind of high resolution timer?

Edited August 9, 2004 by todd`

[azcodemonkey]

Use the AnimateWindow Win32 API function.

[smurfiness]

Well, it's moving very slowly because you're only moving it up one pixel at a time. If you want it to move faster, you can either move it up further each tick, or use a System.Timers.Timer (as opposed to Windows.Forms.Timer). It has a higher resolution, so the speed still increases when you lower the interval below 100 (the SWF timer may or may not speed up).

[todd]

Thanks for the suggestions.. The AnimateWindow API seems the easiest and that's what I'm trying to get working..

AnimateWindow(frmNotification.Handle.ToInt32, ShowTime, &H8)

..is what I have, but nothing happens and when I print the result, it's False. The form is hidden at the time this function is called so I don't know what's wrong (yes, I added the declaration ;)).

[azcodemonkey]

don't use AllApi for Vb.NET. use http://www.pinvoke.net instead.

http://www.pinvoke.net/default.aspx/user32.AnimateWindow

   <FlagsAttribute()> _
    Public Enum AnimateWindowFlags
        AW_HOR_POSITIVE = &H1
        AW_HOR_NEGATIVE = &H2
        AW_VER_POSITIVE = &H4
        AW_VER_NEGATIVE = &H8
        AW_CENTER = &H10
        AW_HIDE = &H10000
        AW_ACTIVATE = &H20000
        AW_SLIDE = &H40000
        AW_BLEND = &H80000
    End Enum
    Public Declare Auto Function AnimateWindow Lib "user32" (ByVal hwnd As IntPtr, ByVal time As Integer, ByVal flags As AnimateWindowFlags) As Boolean


'Usage
        Dim f2 As Form2
        f2 = New Form2
        AnimateWindow(f2.Handle, 1000, AnimateWindowFlags.AW_VER_NEGATIVE Or AnimateWindowFlags.AW_SLIDE)
        f2.Show()

Edited August 10, 2004 by weenur

[todd]

Thanks :yes: