Yes you can. First you need to run a search to capture all the lines of code, e.g. a regular expression like this:
After the search has been run you can use the Keyword reports to count those lines, either by file or as a whole. The only change we need to make is to switch OFF the Keyword Hit column (which would otherwise show each captured line).
Here's an example of the Keyword Summary Report:
And an example of the Keyword by File Report:
Because FileLocator Pro is capturing every line in every file it can consume a lot of memory when run over large code bases.
If you code base has very large files (ie > 10,000 lines of code per file) then you will probably need to increase the maximum lines per file configuration setting.