MapInfo Pro uses the exclamation point (!), the double quote (") and the backslash (\) as special characters. These characters tell MapInfo Pro how to treat strings which follow them, but are not themselves ordinarily treated as characters in substitution strings. The exclamation point tells MapInfo Pro that the string should not be interpreted as an abbreviation. The double quote tells MapInfo Pro that spaces in the string are legitimate. And the backslash tells MapInfo Pro to treat a special character as an ordinary character.
When you want to use any of these in a line where they are to be treated as simple characters, precede them by a backslash. Thus:
\!
\"
\\