Problem with thread

Hello i have problem with thread,

I have Form with listview and User control.
I need the User control to run thread that will clear the listview
in the main form.
the code work but it's not clearing the listview, i debug the code
and i see the line of clearing the listview execute and i don't get
any error message. if i call the test sub directly from the form not
as thread it's work fine. any idea what's wrong

thanks for the replay

i tried to use invoke still not working here's the User Control code after i
changed it:

Imports System.Threading

Public Class UserControl1

Sub start()

Dim t As Thread = New Thread(AddressOf Me.test)

t.Start()

End Sub

Sub test()

If Form1.ListView1.InvokeRequired Then

SyncLock Form1.ListView1.GetType()

Form1.ListView1.Invoke(CType(AddressOf Me.clear, MethodInvoker))

End SyncLock

End If

End Sub

Sub clear()

Form1.ListView1.Clear()

End Sub

End Class

The code i showed was just example for what i'm trying to do it's not the
real code as u can
Imagine
I have listview and i need to update it as there are threads in the
background running that effect the listview.

what will be the best way to do it?

P.S. the threads are part of USER control that i add to the main form that
have the list view

thanks

thanks for the replay

i tried to use invoke still not working here's the User Control code
after i changed it:

Imports System.Threading

Public Class UserControl1

Sub start()

Dim t As Thread = New Thread(AddressOf Me.test)

t.Start()

End Sub

Sub test()

If Form1.ListView1.InvokeRequired Then

SyncLock Form1.ListView1.GetType()

Form1.ListView1.Invoke(CType(AddressOf Me.clear, MethodInvoker))

End SyncLock

End If

End Sub

Sub clear()

Form1.ListView1.Clear()

End Sub

End Class

The code i showed was just example for what i'm trying to do it's
not the real code as u can
Imagine
I have listview and i need to update it as there are threads in the
background running that effect the listview.

what will be the best way to do it?

P.S. the threads are part of USER control that i add to the main
form that have the list view

thanks

thanks for the replay

i tried to use invoke still not working here's the User Control code after i
changed it:

Imports System.Threading

Public Class UserControl1

Sub start()

Dim t As Thread = New Thread(AddressOf Me.test)

t.Start()

End Sub

Sub test()

If Form1.ListView1.InvokeRequired Then

SyncLock Form1.ListView1.GetType()

Form1.ListView1.Invoke(CType(AddressOf Me.clear, MethodInvoker))

End SyncLock

End If

End Sub

Sub clear()

Form1.ListView1.Clear()

End Sub

End Class

The code i showed was just example for what i'm trying to do it's not the
real code as u can
Imagine
I have listview and i need to update it as there are threads in the
background running that effect the listview.

what will be the best way to do it?

P.S. the threads are part of USER control that i add to the main form that
have the list view

thanks