How can i escape special characters( % [ _ ) in an Access SQL statement?

i need to escape characters, such as ( % and/or _ and/or [ ),
since i have database entries that have such characters in them.

the following piece works fine in an SQL statement (c#), but doesn't
return entries that have one of the above characters in the argument.

... like '%" + tbProduct.Text.Replace("'", "''") + "%' ...

thanks folks...

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