Form's Events

[dreamer60]

I have written an application in vb.net 2005. I need to execute some code every time a particular form in my app is activated.By 'activating' I mean whenever the form has to be repainted. Lets make it simple as follows:
I need to display the message 'Hello' every time the form is repainted. Accordingly I coded the MessageBox.Show() method in the Activated() event. But whenever the form is activated the message box appears several times.ie.it reappears every time you press the OK button on the box and stops after some time. ie. the event is called several times.I tried coding it in the Paint() event.But again the same problem is there.I need to display the message box only once when the form is activated. Why is it so? Is that way the event is supposed to work? Paint() works as expected in vb.net 2003. The GotFocus() method does not seem to work at all.How can I do it in vb.net 2005 so that the code is executed ony once? Thanks in adavance...

[DSJ]

The problem is that by showing the messagebox over the form your causing the event(s) to be fired again when you close the messagebox.

[dreamer60]

If that were the case, then why does the message box disappear after some time? If the event is fired again and again, the message box will keep appearing idenfeinitely,no?

[HanneSThEGreaT]

DSJ is correct. Let's go through it step by step.

Activated event
The form gets displayed - Activated
The Messagebox gets shown - Deactivated
The Messagebox gets closed - Activated

GotFocus event
It does work.
The form gets displayed - Got focus
The Messagebox gets shown - Lost Focus
The Messagebox gets closed - Got focus

etc. etc.

I'd put in a Boolean flag, and then after the Messagebox is shown, just set it to true, something like :

Form2

Public Class Form2
    Public Boxshown As Boolean

    Private Sub Form2_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
        If Not Boxshown Then
            Boxshown = True
            MessageBox.Show("test")

        End If
    End Sub

End Class

And because we want this box to show when Form2 gets activated ( meaning another form gets deactivated ), I'm setting the Boolean variable to False, in the particular form that gets Deactivated 's Deactivated event :

Form1

Public Class Form1
    Private f2 As New Form2
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        f2.Show()
    End Sub

    Private Sub Form1_Deactivate(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Deactivate
        f2.Boxshown = False
    End Sub
End Class

Would you be happy with that ¿