[2005] Form dissapearing issue

[dani2]

This is my problem:

I have an add-in button for Outlook 2003 added on standard bar in main Outlook form and also in new message form. The button click event shows a form. When the button is clicked from the new message Outlook window the form shows only for a quick time then dissapears. I could only catch the form.Shown event and thats all. How can I make the form stay opened?


thank you

[alex_read]

Can you post the code you are using to open your form please?

Also (if the above isn't at fault), have you tried setting breakpoints on your methods and stepping through them, perhaps your code is closing the form somehow?

[dani2]

I tried to debug with breakpoints but didnt help. The constructor is called successfully, then the shown event is fired and after this the form dissapears but the code goes on normally.

[dani2]

 Private Sub btn2_Click(ByVal Ctrl As Office.CommandBarButton, ByRef CancelDefault As Boolean)
     Try
         Dim t As New System.Threading.Thread(New System.Threading.ThreadStart(ThreadProc))
        
         t.Start()
     Catch ex As Exception
         _eventlog.WriteEntry(ex.Message + "" & Chr(10) & "" + ex.StackTrace, EventLogEntryType.[Error])
     End Try
 End Sub

 Public Sub ThreadProc()
     Try
         Dim ttf As TTForm = Nothing
        
         ttf = New TTForm(System.Configuration.ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString, _eventlog)
         ttf.outlookApplication = explorer.Application
         ttf.Show()
         ttf.Visible = True
         AddHandler ttf.Shown, AddressOf ttf_Shown
         AddHandler ttf.Disposed, AddressOf ttf_Disposed
         AddHandler ttf.VisibleChanged, AddressOf ttf_VisibleChanged
         AddHandler ttf.FormClosed, AddressOf ttf_FormClosed
            
         MessageBox.Show("Click") ' if this line is removed the form is not visible at all!
     Catch ex As Exception
         _eventlog.WriteEntry(ex.ToString())
     End Try
 End Sub

[dani2]

I think it has to do with threading and ownership but i dont know exactly where to start. Any help is very appreciated.