URL blocking: wildcard "?" and symbol "?"

How can I use the “?” symbol in the URL blocking list (where “?” - isn’t wildcard)?

Example:
http:// … /cnt?cid=anything …,
http:// … /cnt?uid=anything2 … etc.

I want to add “cnt?” in the blocking list, but I think it’s wrong.
I’m tried “??” and “?” combination, but it’s do not work. :frowning:

PS: I’m using Avast 4.5 Home Edition.

Can anybody help me?

I’ve read since from the beginning but I do not know how to solve it…
The only I know is that the exclusion list is read as a text. I’ve asked for ‘superior’ help… Hope they could help you…

To specify precisely the ? character is not possible. It will use ? in the mask, it will work but also allow for any other character in that position (of which a probability is quite low though… don’t you think?)