Adding Simple Labels And Combobox To Code Not Working?

I have a simple poker game that deals out 9 cards into pictureboxes and shows another 3 pictureboxes that hold cards for the dealer. The code itself does what I want it to...even though I'm at a dead end with writing the code further to evaluate the poker hands. I would simply like to add a few labels and a combobox to my form, but everytime I add something, or try to add it I get cast error?

Public Class Form1
Dim ListOfCards As New List(Of String)
Dim dealtCards As New List(Of String)

[code].....