How to launch a form from a a Menu Item

Question

Hi there.

 

I have the following setup in my Menustrip:

 

Inventory->New Item.

 

I want to be able to doubleclick and launch a form where I can collect information from the user to populate a new item.

 

I know how to setup de basic Menustrip and to setup the sub-menus.  What I don't know where to design the form to collect the data and how to launch it upon the double clicking.

 

My environment is Windows 10, Visual Studio 2017 and C#

 

I appreciate your help.