Outlook OM : Method Restrict() has problems with parentheses

[tsfreaks]

I'm trying to filter for a specific name using;
olItems.Restrict("[From] = John Doe()");

Notice the parentheses in the string. If the string
contains parentheses in it, I get the following exception.

An unhandled exception of
type 'System.Runtime.InteropServices.COMException'
occurred in ioemail.dll
Additional information: Condition is not valid.

How do I get Restrict to work with parentheses?

 

[tsfreaks]

Answer:
olItems.Restrict("[From] = 'John Doe()'");