(c) Briefly explain the difference(s) between design-time and run-time modes in VisualBasic. (4 Marks)(d)

Design-time and run-time modes in VisualBasic refer to different stages of the software development process.

1. Design-time mode: During design-time mode, developers create and design the user interface and functionality of the application. This is done using the VisualBasic IDE (Integrated Development Environment). In this mode, developers can add controls, set properties, write code, and design the layout of the application. Design-time mode allows developers to visually design the application and make changes to the design without running the application.

2. Run-time mode: Once the application is designed and developed, it can be executed in run-time mode. Run-time mode refers to the actual execution of the application by end-users. In this mode, the application runs independently and users can interact with it. The application behaves as intended and users can input data, perform actions, and see the results. Run-time mode is the actual operational mode of the application.

The main difference between design-time and run-time modes is that design-time mode is used for designing and developing the application, while run-time mode is used for executing and using the application. In design-time mode, developers have full control over the application's design and functionality, while in run-time mode, end-users interact with the application based on the design and functionality implemented by the developers.