Not Supported Exception in Threading

[gRob_AndDerSon]

Hi there peeps, shaggy, and other members

Question:
How can I use threading in my applications that show the splash screen while initializing the form to be show then close the Splash Screen when its done to show the selected form

I set the start up to Sub Main. When I run my piece of code below, it
got an error when i showdialogue the selected form

Error:
Not Supported Exception
Control.Invoke ..... etcc

Here's my Long Code

Module Main

 Public nextform As TemplateForm   'Inhereted Form
 Public curForm As TemplateForm    'Inhereted Form
 Dim splashScreen As New Wallpaper ' This is the Splash Screen Form
 Dim t As Thread
 
 Public Delegate Sub CloseSplashScreenCallback()
 Public Delegate Function DeviceRegsCallback() as  _ 
                  DeviceRegistrationForm
 Public Delegate Function LoginCallback() As LoginForm

 Sub Main()
    ' Upon(startup)

    t = New Thread(New ThreadStart(AddressOf BackgroundProcess))
    t.Start()
    Application.Run(Splashscreen)
        
    curform.ShowDialog

 End Sub
 
 Private Sub BackgroundProcess()
        ' Select what Form to be load
        Using ta As New So_UsersDatasetTableAdapters.SO_UsersTableAdapter
            If ta.CheckifExistingUser.Value = 0 Then
                 Dim refa As IAsyncResult = DeviceRegistrationForm.BeginInvoke(New  _                     
                      DeviceRegsCallback(AddressOf CallDevRegs))
                 curForm = DeviceRegistrationForm.EndInvoke(refb)
            Else
                Dim refb As IAsyncResult = LoginForm.BeginInvoke(New  _                     
                      LoginCallback(AddressOf CallLogIn))
                curForm = LoginForm.EndInvoke(refb)
            End If

        End Using

        Dim instance As CloseSplashScreenCallback = New  _                                    
          CloseSplashScreenCallback (AddressOf CLoseSplashScreen)
        splashScreen.Invoke(instance)

 End Sub

 Private Function CallLogIn() As LoginForm
      Dim frm As New LoginForm
      Return frm
 End Function

 Private Function CallDevRegs() As DeviceRegistrationForm
      Dim frm As New DeviceRegistrationForm
      Return frm
 End Function

 Private Sub CLoseSplashScreen()
      splashScreen.Close()
 End Sub

End Module

Another Question where should i place threading abort in my appz..
Hope you can help me with this. Its my problem since last Wed and until now, I can't get the solution

[petevick]

Hi,
I think some of the functions you are using are from the full framework, hence the 'not supported' exception.

Try http://www.codeproject.com/netcf/casoast.asp or http://www.microsoft.com/downloads/d...displaylang=en or http://blogs.msdn.com/davidklinems/a...17/452804.aspx
for samples of splash screens, both multi-threaded and normal.

You can always use a translation site to move from C# to VB

Pete

[gRob_AndDerSon]

Peeps, thanks a lot for the references you've provided. Most of the C# to VB.Net Converter I had found on the net doesn't fully convert the code, so what I'm doing is I convert it by myself.

You know what after this project, I am planning to migrate form VB.Net to C#.Net which is good for me to start coz I have an adequate background in C/C++ and a little in java..

P.S. If you have a good references on how to Start in C# in a simple way, Kindly give it to me.

Thanks again peeps. May God be with you always