In order to add controls to a form, it must first select the form in the Form toolbox. Option C is correct.
A toolbox is defined as a window that comprises icons and buttons that represent program tools. The tools are meant to furnish a speedy approach to common operations.
A toolbox can float freely or be docked in the program's main window. To add controls to a form, it is important to first select the form in the Form toolbox.
Therefore, Option C is correct.
Learn more about the toolbox, refer to:
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