I'm editing some Arduino code written by others which has the use of the words "or" and "and" instead of || and &&.  I wasn't familiar with this before, but apparently it's a standard language feature of C++ (https://stackoverflow.com/a/6006540/651139). ; Visual Studio with VisualMicro thinks these keywords are errors, but they compile just fine in the Arduino IDE.  The previous link indicates I need to add the "/Za" flag to compile correctly in Visual Studio.  But, when I right click on my VisualMicro project, I don't see any tab for C/C++ properties.  How can I get Visual Studio/VisualMicro to stop treating these valid expressions as errors?