Create warning statistics from teamcity build log

Hello

We would like to create a statistic for the number of warnings in a build configuration.

Therefore I was wondering how to do this. Is it possible to somehow search the build log as part of a build configuration. We currently invoke devenv.com (visual studio) via the command line in a command line build step. The output is seen in the team city build log. But how to detect the number of warnings to add to the build statistic.

I know how to create a graph, and a data to it via '##teamcity[...' but cannot figure out how to get the number to add. I could of course change the build step to output to a file and then search that, but this makes it quite difficult to follow the build output via team city.

Any help is much appreciated.

Kind regards
Kim