Are process and console valid Arduino identifiers?

Which Ide and arduino version are you using?

Which Ide are you using?

Thanks

Also, Visual Micro IDE - VS 2013

Oh okay that makes sense except it is Console.

It sounds like vm isn't managing the project.

Does compile work?

Sounds like you are not setup correctly

Let's start with the basics.

Do you have a list of boards on the tool bar? 
Is the Yun listed?
On the tool bar to the left of the boards list, what is the name of the "ide"? arduino 1.0.x or arduino 1.5.x?

Thanks

Please switch the board to a different once such as the Uno and then switch back to the Yun.

Does that fix the intellisense errors?

Hi,

Okay you should use visual micro to create a new sketch or open an existing sketch so that the right kind of c++ project is configured automatically for you. It also ensures the rules are followed for an arduino project (sketch.ino and folder name must match, plus for vm we make sure the project name also matches)

If you have a "File>New Project" menu then you selected a simpler UI layout for Visual Studio than we normally see. Normally we have a "New" sub menu on the "File" menu. It is on the "New" menu that Visual Micro places the "New Sketch Project" menu item just below the "New Project" menu item.

You can either add the visual micro menu items yourself via using "tools>customise>commands" 

or 

Switch to the full Visual Studuio menu system via "tools>import/export settings". In the import/export window click "import selected". Then click "Next" until you see the list of layouts that appear when you first installed Visual Studio. The "General" layout is a good one.

Can you please show a screen shot of the ide with the project open

Thanks