Hi,

This is a little easier in VS but it is up to you how you work. I am not sure of the best workflow but can give some tips...

1) You can create your own libraries in documents\arduino\libraries (or where ever your main SketchBook folder is). This is the best place because the libraries folder under the Arduino Ide is lost when you upgrade Arduino.

2) The Refresh option on "Project>Add/import Arduino Library" will detect new libraries and library sources without need to re-start the ide

3) You can create more than one project in the same Atmel solution so one could be a sketch and one project could contain the library sources.

4) You are right that library folder name should match a .h in the lib sources.

5) Newer versions of Arduino support various sub folders below each library. This new spec. is still being discussed on the Arduino dev channel so I suggest you run with the older structure which is supported in both new and old Arduino versions. This structure is a single folder for each library with optional /utility sub folder.

6) It doesn't much matter to the compiler if your lib sources are local to the sketch or included in a library. I am not sure how responsive the Atmel intellisense engine is to detecting source code changes in referenced non-project source files.

7) I am sure there are other considerations but can't think of them off the top of my head 

That's a good idea.

Tip

If you make the name of the .cpp end with a name ending with Class, then Visual Micro will also create a class and instantiate as an external object adding an init() method as a public method example.

For example:- 

Create a new cpp with the name MyButtonClass and then in the .ino sketch code type MyButton. this will give intellisense for MyButton. 

Look into the cpp and you will see MyButtonClass with MyButton being created ready to go. It's not always the way users want to work but it is a reminder of how to do some stuff.

Great to hear that thanks