Include for StandaloneFilterWindow?

Hi, excuse my uber-noob question as I’m no C++ or Juce expert. But how do I include StandaloneFilterWindow?

Don’t understand… What’s going wrong when you try to include it?

Oops, I found it: …/…/…/modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h

Thanks!