Add New Item Dialog Box (Visual Studio)
The Add New Item dialog box enables you to add an item to the currently selected project. There are two panes in the dialog box:
The Categories pane lists the project item hierarchy.
The Templates pane lists the related project item types.
When you select an item from the Categories list, the appropriate files and references are added to your project. The type of project selected determines the item choices that appear.
To add a new item
On the Project menu, click the type of library that you want to add.
On the Add New Item dialog box, confirm that the correct template is highlighted.
Next to Name, type the name that you want to use for the library.
Click Add, and follow the directions for the relevant Wizard.