Okay, here's what I did.

I created ComboBox11 and TextBox19. I put several strings in the combo box.

In design mode, I clicked the combobox, and wrote this code....

Code:
Private Sub ComboBox11_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox11.SelectedIndexChanged
        TextBox19.Text = TextBox19.Text + ComboBox11.Text
End Sub
When I run it, every time I choose a string from the combo box, it adds the string to the text box. I can create a large paragraph this way in the text box by adding one string at a time from the combo box.