Which built-in features use the VS/.Net macros

[kinook]

The Make VS actions do not use the DEVSTUDIO_NET_DIR macro (only the two actions you mentioned do).

The Make VS* actions are all aliases for the same action, so you don't actually have to switch the step action -- the action determines the matching version of VS to invoke based on the solution or project file version (see http://kinook.com/Forum/showthread.php?t=4500).