- Visual Studio Project and Item Templates
MSDN Library. - Wizards for Project Templates (Microsoft.VisualStudio.TemplateWizard.IWizard)
MSDN Library - Custom Wizards for New Project and Add Item (EnvDTE.IDTWizard)
MSDN Library - Code Generation and T4 Text Templates
MSDN Library - VS 2017: Upgrading Custom Project and Item Templates for Visual Studio 2017
Microsoft documentation