Adding controls to the form... help

I am trying dynamically create controls and add them to the form on the
Separate thread.
I know that I have to use delegate in order to update preexisting
controls on the form, but when I ma trying create new control I am
getting this message:
System.ArgumentException: Controls created on one thread cannot be
parented to a control on a different thread.
this is a sample code to reproduce error:

Delegate Sub MyDelegate()
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Dim dd As New MyDelegate(AddressOf addctrl)
For i As Int32 = 0 To 10
Try
dd.BeginInvoke(Nothing, Nothing)
Catch ex As Exception
End Try
System.Threading.Thread.Sleep(500)
Next
End Sub
Sub addctrl()
Try
Dim x As New TextBox
Me.Controls.Add(x)
Debug.WriteLine(Me.Controls.Count)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Sub

is there any way around it?

basicaly I have dataset which is updated and repopulated on the separate
thread and the it raises event and form gets recreated. IS there a way to
marshal event to proper thread??
any Ideas

I am trying dynamically create controls and add them to the form on
the Separate thread.
I know that I have to use delegate in order to update preexisting
controls on the form, but when I ma trying create new control I am
getting this message:
System.ArgumentException: Controls created on one thread cannot be
parented to a control on a different thread.
this is a sample code to reproduce error:

[code]

is there any way around it?

basicaly I have dataset which is updated and repopulated on the
separate thread and the it raises event and form gets recreated. IS
there a way to marshal event to proper thread??
any Ideas

Hi Arthur,

You need to use the form's Invoke method to switch you call back to
the form's thread. The code basically stays the same. NOTE: I'm
writing this code in Outlook so no sytax check has been done (hopefull
that feature will be in Office 2004!)

Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
Dim dd As New MyDelegate(AddressOf addctrl)
For i As Int32 = 0 To 10
Me.Invoke(dd, Nothing)
Next
End Sub

For more information check out Chris Sell's series on Safe, Simple
Multithreading in Windows Forms.

http://msdn.microsoft.com/library/de...y/en-us/dnform
s/html/winforms06112002.asp