Memory Game Help! How to show the unpaired cards - vb.net

Question

Showing the paired cards on my memory game is working fine. But the problem is I can't show the unpaired cards. There are 20 cards on my game.
Dim paircount As Integer = 0
Dim unpaircount As Integer
Dim Card1 As Integer = 0
Dim Card2 As Integer = 0
Dim Card1pic As Integer = 0
Dim Card2pic As Integer = 0
Dim Score As Integer = 0
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
st = st + 1
Label3.Text = "Time : " & st & " seconds"
Label7.Text = "Pairs : " & paircount
If paircount = 19 And Card1 <> 0 And Card2 <> 0 Then
paircount = paircount + 1
victory()
Label32.Text = "Unpaired : 20" & unpaircount 'This is my code for showing the unpaired card & and it's not working
If unpaircount = 19 And Card1 = 0 And Card2 = 0 Then
unpaircount = unpaircount - paircount
End If
End If
End Sub

Answer 1

'[Begin]Declare Object/Value'
Dim paircount As Integer = 0
Dim unpaircount As Integer
Dim Card1 As Integer = 0
Dim Card2 As Integer = 0
Dim Card1pic As Integer = 0
Dim Card2pic As Integer = 0
Dim Score As Integer = 0
'[End]Declare Object/Value'
'[Begin]Tick handles'
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
st = st + 1
Label3.Text = "Time : " & st & " seconds" ' Default As 1, in your code'
Label7.Text = "Pairs : " & paircount ' Default As 0, in your code'
If paircount = 19 And Card1 <> 0 And Card2 <> 0 Then ' Card1 & 2 default as 0, return False'
paircount = paircount + 1 ' paircount is 20
victory() ' your function or sub'
Label32.Text = "Unpaired : 20" & unpaircount 'Default as null, return 0: Unpaired: 200'
If unpaircount = 19 And Card1 = 0 And Card2 = 0 Then 'unpaircount = 0, will not be active this checking, please make sure your code will change the unpaircount value before this checking'
unpaircount = unpaircount - paircount
End If
End If
End Sub
'[End]Tick handles'
As your code provide by yourself, for first of the checking under
'If paircount = 19 And Card1 <> 0 And Card2 <> 0 Then'
Is any way to change paircound/card1/card2?
If not, that mean the checking will not be accept and for my view,
I think your code was successful display the result: no change, no display
Best Regards,
KT