Regex: To pull out a sub-string between two tags in a string

Question

I have a file in the following format:

Data Data
Data
[Start]
Data I want
[End]
Data

I\'d like to grab the Data I want from between the

Answer 1

\[start\]\s*(((?!\[start\]|\[end\]).)+)\s*\[end\]

This should hopefully drop the [start] and [end] markers as well.