Performing actions on a form from another form?

[nikefido]

Hi, I am programming using VS2005, creating a windows application (Using visual basic).

I'll attempt to keep this simple:
We have on Form1 a listbox populating froma column in a datatable.

We have a Form2 which is used to add data to that datatable. When that table closes, we would like the listbox on Form1 to update (for example, run the ____tableadapter.fill(___dataset.datatablename method).

Is there a "simple" way to update items in a form from another form (I have tried running code:

    Private Sub Form5_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        My.Forms.Lookup_Form.Client_InformationTableAdapter.Fill(Me.CSG_Information_DashboardDataSet.Client_Information)
    End Sub

I tried this code in a button on Form5 also, with no luck.

Any ideas on how to get this done?