vb.net combobox hide item - vb.net

Question

I have a combobox that when the item is selected and it's the same as a button.text in other form the button.text changes for the name that the user typed in a textbox. But if the item is different of the button.text I want to hide it, so the user can't select it or see it.
cafetariacombo is the combobox Form3.cafetaria2.Text is the button I'm changing
If cafetariacombo.SelectedItem = "cafetaria2" Then
Form3.cafetaria2.Text = TextBox1.Text
My.Settings.cafetaria2guardar = Form3.cafetaria2.Text
My.Settings.Save()
end if
I use this to name the button, I just need to know if I can hide the combobox item.
Help me please :)
Update with some code
I inserted the list of items myself in the combobox.
I solved my earlier problem, but now i need to save the state of the combobox items when I leave the form.
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If cafetariacombo.SelectedItem <> Form3.cafetaria1.Text Then
cafetariacombo.Items.Remove("cafetaria1")
End If
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If ComboBox2.SelectedItem = Form3.cafetaria1.Text Then
Form3.cafetaria1.Text = "cafetaria1"
My.Settings.cafetaria1guardar = Form3.cafetaria1.Text
My.Settings.Save()
adicionarproduto.cafetariacombo.Items.Add("cafetaria1")
end if
end sub
When I remove the item from the combobox I'm in form1 and when I add the item again I'm in form2. Just need to save the combobox with the deleted item when I leave the form1.

Answer 1

You can use a DataTable as data source, then it's as easy as changing DefaultView.RowFilter, please study this example and let me know if you have any questions:
Public Class Form1
Private Sub Button1_Click(sender As System.Object,
e As System.EventArgs) Handles Button1.Click
Dim dt As New DataTable
dt.Columns.Add("id")
dt.Rows.Add("1")
dt.Rows.Add("2")
dt.Rows.Add("3")
ComboBox1.DisplayMember = "id"
ComboBox1.DataSource = dt 'show all items by default
End Sub
Private Sub Button2_Click(sender As System.Object,
e As System.EventArgs) Handles Button2.Click
DirectCast(ComboBox1.DataSource, DataTable).DefaultView.
RowFilter = "id <> 2" 'hide item=2 from the view
End Sub
End Class