Nested expressions allow you to create complex searches for information. For example, "control AND ((active OR dde) NEAR window)" finds topics that contain the word "control" along with the words "active" and "window" close together, or that contain "control" along with the words "dde" and "window" close together.
The basic rules for searching help topics using nested expressions are as follows:
You can use parentheses to nest expressions within a query. The expressions in parentheses are evaluated before the rest of the query.
If a query does not contain a nested expression, it is evaluated from left to right. For example: "Control NOT active OR dde" finds topics that contain the word "control" without the word "active," or topics that contain the word "dde." On the other hand, "control NOT (active OR dde)" finds topics that contain the word "control" without either of the words "active" or "dde."
You can nest expressions a maximum of five levels deep.