Hi,

Visual Studio C++ intellisense fails on a few arduino commands especially the ones you can see that relate to the core used by all sketch projects. It's a 99% fit.

The intellisense error list is not so important because you should see red squiggles in the code when there is an error. The code completion and intellisense that appears when you type, for example, "Serial." should all be working okay.

The error list can be closed if it is confusing.

Visual Studio 2013 Community might be better, you can install both on the same machine. Atmel Studio (based on vs 2010) will give 100% fit

As you rightly say, the compile is correct because Visual Micro compiles the same way the Arduino Ide compiles. The intellisense that is left up to each Ide to decide how to implement.

Hope this helps, sorry it's not a perfect picture.

A new beta was just about to be published so I looked at the errors and changed the intellisense slightly. Please try the beta from the visual micro downloads page.

Otherwise if you do install atmel then run the vm installer and click remove, then run again and click instal. that's the quickest way to setup a new ide with visual micro and you will not loose your settings.