Things like buttons, textboxes, and labels are Tools that you can add to your Forms. They are keep in the Toolbox for ease of use.
The Toolbox can be found on the left side of the screen as shown (View Image).
To display all the tools, move your mouse over the toolbox icon.
You'll see several categories of tools available: All Windows Forms, Common Controls, Containers, Menus & Toolbars etc.
To display all the available tools that you can use, click on the plus symbol next to All Windows Forms and you'll see a long list of tools as shown above.
To start our design, we can use the Button, the TextBox and the Label tools.
If you want to keep the toolbox displayed, click the Pin icon next to the X button. (View Image)
To close the toolbox, simply move your mouse away.
