Tray Notification Popup Window

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VB

Hi,

I am working on VB.Net Windows Application.
I am trying to create a popup window application that shows above tray menu.

Code in Form 1

'in button click event
Dim frm As New newRequest("some text")
frm.Show()

Code in Form 2

Dim receiveValue As String = "";

Public Sub New(ByVal str As String)
    MyBase.New()
    InitializeComponent()
    receiveValue = str
End Sub

Private Sub form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Me.TopMost = True
    Label1.Text = str
    Me.Location = New Point(Screen.PrimaryScreen.Bounds.Width - Me.Width, Screen.PrimaryScreen.Bounds.Height)
End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    If i = 200 Then Me.Close()
    Me.Location = New Point(Me.Location.X, Screen.PrimaryScreen.WorkingArea.Height - Me.Height)
    i += 1
End Sub

'set timer interval to 10

The above code is working fine but when I click the Button on Form 1, a new form opens up. When I click the Button on Form 1 again, then again a form opens up, which hides/overlaps the previous form i.e. opens up with covering the previous form.

Here on, I want that the new form shall be opened just above the previous form (like G-Talk notifications) but does not hide/overlap it.