Visual Basic - Class 8 CBSE Computer Notes

📘 Visual Basic - Class 8 CBSE Notes

🔰 Introduction to Visual Basic

1. Visual Basic (VB) is a high-level programming language developed by Microsoft.
2. It allows you to create Windows-based applications with graphical interfaces.
3. It is suitable for beginners and school students.

💡 Event-Driven Programming

1. VB uses event-driven programming, meaning code runs based on events like button clicks or mouse moves.
2. Events are actions performed by the user that trigger specific responses.

💻 Visual Studio 2017 Express

1. Visual Studio Express is an IDE (Integrated Development Environment) by Microsoft.
2. It includes tools to design forms, write code, test and debug applications.

🚀 Starting Visual Studio Express

1. Go to Start → Search "Visual Studio 2017 Express".
2. Click to open the IDE.
3. Select "New Project" → Windows Forms App.

🧩 Components of the Window

1. Menu Bar – Contains File, Edit, View, etc.
2. Toolbox – Provides GUI controls like buttons, labels, textboxes.
3. Form – The design area for your application window.
4. Properties Window – Used to change the settings of controls.
5. Solution Explorer – Displays files in the project.

🔄 Modes of Visual Studio

1. Design Mode – Used to design the layout (drag and drop controls).
2. Run Mode – Used to test/run the application.
3. Break Mode – Used to debug code.

🛠️ Properties, Methods & Events

1. Properties – Define control features (Text, Color, Font).
2. Methods – Built-in actions (e.g., Show(), Close()).
3. Events – Triggered by user actions (Click, Load).

🎛️ Various Controls in VB

1. Label – Displays text.
2. TextBox – Accepts input from user.
3. Button – Performs an action on click.
4. CheckBox, RadioButton, PictureBox, ListBox – Other useful controls.

🔠 Label Control

1. Used for displaying static information on form.
2. Set the Text property to change what it displays.

📝 TextBox Control

1. Used to receive input from the user.
2. Text property stores what the user typed.

🔘 Button Control

1. Used to perform an action when clicked.
2. Click event triggers the assigned code.

⚙️ Working with Controls

1. Drag control from toolbox to form.
2. Select control → Use Properties Window to change its name, text, color, etc.
3. Double-click control to write code for its event.

🔧 Changing Properties of Controls

1. Click on a control to open its Properties window.
2. Change values like Name, Text, Size, Color as needed.

📥 Commonly Used Functions

1. MsgBox(): Shows a message box.
   MsgBox("Hello Student!")
2. InputBox(): Gets input from the user.
   name = InputBox("Enter your name")

💾 Saving a VB Application

1. Go to File → Save All.
2. Choose location and name your project.

📂 Opening an Existing VB Project

1. Open Visual Studio → File → Open → Project/Solution.
2. Select the .sln (Solution) file to load your project.



---

---

---

---

🔔 Subscribe to My Channel