Visual Basic Events and Event Procedures Quiz

Timer Control

• The event that occurs when Timer1.Interval milliseconds elapses is called the Timer1_Timer event.
• To begin a timer in Visual Basic, use the Timer1.Enabled = True property.

Control Naming and Properties

• The suggested prefix for naming Line controls in Visual Basic is "lin".
• The PictureBox control can display various file types, including .bmp, .jpg, .gif, .ico, and .wmf.
• The AutoSize property can be used to resize pictures in an Image control to fit the control.
• The LoadPicture function can be used to assign a picture to an Image control at runtime.
• A good programming habit when naming Visual Basic controls is to use meaningful and descriptive names.
• Words in a Visual Basic control name are typically concatenated using underscores ("_").
• The ForeColor property affects the color of the text in most visible objects.
• The Text property contains the string of characters that appears inside a control in Visual Basic, such as a label or textbox.

Control Behavior and Events

• At runtime, controls and forms are visible and enabled by default.
• The Location and Size properties affect the position and size of visible objects in Visual Basic.
• Hiding controls in a disabled state is useful for temporarily preventing user interaction or removing visual clutter.
• The DblClick event occurs when the user double-clicks on a control using the left mouse button.
• The KeyPress event in Visual Basic is triggered when a key is pressed while the control has focus.
• The TextChanged event in Visual Basic is fired whenever the contents of a control change.
• The MouseUp event signifies that the mouse button has been released after being clicked.
• The MousePointer property affects the shape of the mouse cursor when hovering over a control.

Form Properties and Behavior

• The primary purpose of a Form in a Visual Basic program is to provide the visual interface for the application.
• The Name property of an object must start with a letter.
• The Caption property determines the title that appears in the title bar of a Form or MDI form object.
• Setting the Enabled property to False for a form or control disables it, preventing user interaction.
• The ControlBox property indicates whether the form has a control box (for minimizing, maximizing, and closing).
• The Appearance property specifies whether controls on an MDIForm or Form Object have a 3D appearance.
• A MaxButton property with a value 'False' indicates that the maximize button is disabled.
• A MinButton property with a value 'True' signifies that the minimize button is enabled.
• A Visible property with a value 'False' represents that the form is hidden.
• A WindowState property with a value 'VbMaximized' indicates that the form is maximized.

CommandButton Control

• The purpose of a CommandButton control in Visual Basic is to allow users to trigger actions.
• A Moveable property with a value '0' signifies that the control cannot be moved.