How to avoid a metacharacter in a regular expression

Language: asp

This is a sample of my code:

str = "www.example.com/gotobuy.aspx?id=1234"
key_word = ".obuy."
Dim regEx
Set regEx = New RegExp
regEx.Pattern = key_word
regEx.IgnoreCase = True
regEx.Global = True
Set Matches = regEx.Execute(str)
if matches.count > 0 then
    new_string =  str
    For Each Match in Matches
        new_string = replace(new_string,match.value,"")
    Next
else
    new_string = str
end if
response.write new_string

      

        
        
        
      

    

The answer will open:

www.example.com/goaspx?id=1234

      

        
        
        
      

    

I know (.) Is one of the metacharacters. But what if I want (.) Just (.), Not a single word. What should I do?

Thanks for the help!