problem with

how to make cross-theard calls to windows forms control ?
my code is
[code]
Imports System.Threading
Public Class Form3
Public UseTherad As New Thread(AddressOf fillcombo)

Private Sub fillcombo()
Dim i As Int64 = 0
Do While i < 100000
Me.combofill.Items.Add(i)
i += 1
Loop
End Sub

Private Sub Form3_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
UseTherad.Abort()
UseTherad.Join()
End Sub
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
UseTherad.Start()
End Sub
End Class
[\code]