ByusingtheVisualStudio2012SDK,youcancreatetoolwindows,menucommands,editorextensions,isolatedshellprojects,andotherextensionsforVisualStudio.TheSDKalsohelpsyoutestanddebugyourextensionsinanexperimentalinstanceofVisualStudiosothatyourprimarydevelopmentenvironmentisnotchangedunexpecte