Simon Mourier's Blog - WinForms: How to get a reference to a Loaded Form

WinForms: How to get a reference to a Loaded Form

You should use the ParameterizedThreadStart constructor and pass the Form instance for example, something like this:

Dim th As New Thread(AddressOf (New Ecoute).Ecouter)
th.Start(this)

Sub Ecouter(ByVal data As Object)
' you can safely cast data as a Form
End Sub