That should be it, .hps files should be color coded and parsed for completion as you added them to the project. If they did not, you can re-tag the workspace, project or the single file to see if it helps. If no color coding, it can be forced in View→View As: C++.
Info about Settings→Syntax Highlighting and Fonts→Customize→Edit Lexer keyword sets, Set 0 to Set 4: