Microsoft Certified Professional Developer/Exam 70-526/Add and configure a Windows Form/Add a Windows Form to a project at design time

Windows Forms are added to existing projects at design time by doing the following:

   1. Locate the 'Solution Explorer'. If it is not already open it can be opened as follows
       a. On the main menu click on 'View' then select 'Solution Explorer' or use the key combination 'Ctrl+Alt+L'
   2. Rick click the solution to which you wish to add the form
   3. Select 'Add' from the menu
   4. Select 'Windows Form' from the sub-menu or from that same menu you can select 'New Item' and a dialog will 

open listing all the possible file types you can add to a project, from there select 'Windows Form'