[RESOLVED]Q about Locking combobox

[Deny Winarto]

Ok, There are 7 textboxes, named A-G and a combobox(combo1)
I'm trying to block user's accesss to the combobox if the 7 textboxes are still empty,
so the user has to fill in all 7 texboxes with any number to be able to access the combobox.
So i lock the combobox at the start of the program :

Private Sub Form_Load()

combo1.locked = true

End Sub

then i put this code in each textbox (A.text until G.text) :

If Not Len(A.Text) And Not Len(B.Text) And Not Len(C.Text) And Not Len(D.Text) And Not Len(E.Text) And Not Len(F.Text) And Not Len(G.Text) = 0 Then
combo1.locked = false

Now the problem is :
If i put the numbers in order from A to G, the combobox would be unlocked.
OK, at first I thought there was no problem...
but if i put a number only in G a(the last textbox, the other textboxes are still empty) the combobox would be unlocked as well,
now i don't want this to happen because the user has to fill in all textboxes before he could access the combobox,
So how do make it work like that?