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Questions and Answers
Which MessageBoxIcon enumeration represents a warning message?
Which MessageBoxIcon enumeration represents a warning message?
- Warning (correct)
- Error
- Information
- Question
What is the return value from a dialog box labeled with 'Cancel'?
What is the return value from a dialog box labeled with 'Cancel'?
- Abort
- End
- Close
- Cancel (correct)
Which MessageBoxIcon does NOT display any symbols?
Which MessageBoxIcon does NOT display any symbols?
- None (correct)
- Error
- Information
- Warning
What symbol does the Information MessageBoxIcon contain?
What symbol does the Information MessageBoxIcon contain?
Which of the following is NOT a DialogResult enumeration?
Which of the following is NOT a DialogResult enumeration?
What is the primary function of controls in a graphical user interface (GUI)?
What is the primary function of controls in a graphical user interface (GUI)?
In which section does one typically manage a control's properties in a programming environment?
In which section does one typically manage a control's properties in a programming environment?
What is an appropriate three-letter lowercase prefix for a Button control?
What is an appropriate three-letter lowercase prefix for a Button control?
Which of the following is NOT a recommended control prefix?
Which of the following is NOT a recommended control prefix?
What happens when you click the lightning bolt button in the Properties window?
What happens when you click the lightning bolt button in the Properties window?
Which property organization method places the control's name at the top for convenience?
Which property organization method places the control's name at the top for convenience?
What is the purpose of grouping properties in the Properties window?
What is the purpose of grouping properties in the Properties window?
Which control is identified by the prefix 'chk'?
Which control is identified by the prefix 'chk'?
What property of the button control sets its flat style appearance?
What property of the button control sets its flat style appearance?
Which property determines how text is aligned within a TextBox control?
Which property determines how text is aligned within a TextBox control?
What does the PasswordChar property in a TextBox control specify?
What does the PasswordChar property in a TextBox control specify?
Which event is the default for a Button control?
Which event is the default for a Button control?
What does the MaxLength property of a TextBox control denote?
What does the MaxLength property of a TextBox control denote?
Which property of the FlatAppearance defines the border and colors in flat style?
Which property of the FlatAppearance defines the border and colors in flat style?
What functionality does the Focus() method provide for a TextBox control?
What functionality does the Focus() method provide for a TextBox control?
Which property allows you to set whether a TextBox control can be edited?
Which property allows you to set whether a TextBox control can be edited?
What property determines how a control is resized with its parent control?
What property determines how a control is resized with its parent control?
Which property is used to set the text displayed by a control?
Which property is used to set the text displayed by a control?
What does the 'Dock' property primarily influence in a control?
What does the 'Dock' property primarily influence in a control?
Which property would you adjust to change the control's background image?
Which property would you adjust to change the control's background image?
If you want to disable user interaction with a control, which property should you set to false?
If you want to disable user interaction with a control, which property should you set to false?
Which property defines the position of the control within its parent container?
Which property defines the position of the control within its parent container?
What does the 'ForeColor' property control in a control?
What does the 'ForeColor' property control in a control?
Which property would you modify to change the size of a control?
Which property would you modify to change the size of a control?
What is the primary purpose of the Focus() method in the context of user interface design?
What is the primary purpose of the Focus() method in the context of user interface design?
What happens when the Focus() method is invoked on a TextBox control during the form load event?
What happens when the Focus() method is invoked on a TextBox control during the form load event?
Which of the following parameters is NOT required by the MessageBox.Show function?
Which of the following parameters is NOT required by the MessageBox.Show function?
What is the return type of the MessageBox.Show function?
What is the return type of the MessageBox.Show function?
What does the MessageBoxButtons enumeration specify?
What does the MessageBoxButtons enumeration specify?
Which of the following is a valid button combination in the MessageBoxButtons enumeration?
Which of the following is a valid button combination in the MessageBoxButtons enumeration?
What is a likely outcome if the MessageBox.Show function is called with the parameters for the 'OKCancel' button setting?
What is a likely outcome if the MessageBox.Show function is called with the parameters for the 'OKCancel' button setting?
Which buttons does the MessageBoxButtons.YesNoCancel enumeration include?
Which buttons does the MessageBoxButtons.YesNoCancel enumeration include?
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Study Notes
Controls
- Controls are graphical user interface (GUI) elements used in forms.
- They act as visual widgets for user interaction.
- Controls manipulate other objects in the backend, like database control and timer control.
- You can change a control’s properties by editing them in the Properties window.
Properties Window
- The Properties Window allows you to view a control's properties.
- Properties can be organized by category or alphabetically.
- Clicking the lightning bolt button lets you view events associated with a control.
Control Prefixes
- It's recommended to use 3-letter lowercase prefixes for controls to improve code readability.
- Examples include:
- Form: frm
- Button: btn OR cmd
- Label: lbl
- TextBox: txt
- CheckBox: chk
- RadioButton: opt
- List control: lst
- Combo Box: cmb
- Group Box: grp
- Panel: pnl
- Picture Box: pct
Common Control Properties
- Name: Programmatic name of the control.
- Anchor: Determines how a control is resized with its parent container.
- BackColor: Background color of the control.
- BackgroundImage: Background image displayed in the control.
- Dock: Determines how a control is resized with its parent control.
- Enabled: Indicates whether the control can respond to user interaction.
- Font: Font of the displayed text of the control.
- ForeColor: Foreground color of the control.
- Size: Gets or sets the control's size (Height and Width).
- Location: Represents the control's upper-left corner in container coordinates.
- Text: Text associated with the control.
- Visible: Indicates whether the control is shown or hidden.
Form
- The Form is the main container for controls in an application.
- An application can contain multiple forms.
Form Properties
- FlatStyle: Controls the appearance of the button control in flat style.
- FlatAppearance: Defines the appearance of the flat style border and colors.
- Image: Sets the image displayed on the button control.
- ImageAlign: Controls the alignment of the image on the button control.
- TextImageRelation: Determines the position of text relative to the image.
Button Control
- The default event for the Button control is Click.
Text Box
- The TextBox control facilitates user input of text.
Text Box Properties
- BorderStyle: Sets the border type.
- MaxLength: Limits the maximum number of characters that can be entered.
- Multiline: Indicates whether the textbox can accept multiple lines of text.
- PasswordChar: Defines the character used to mask password characters visually.
- ReadOnly: Makes the textbox read-only.
- SelectedText: Provides access to the currently selected text.
- TextAlign: Sets the text alignment within the textbox.
Text Changed Event
- The default event for the TextBox control is TextChanged.
Focus() Method
- Focus() method dynamically places the cursor in a control, allowing for immediate user interaction.
- It is commonly used with the TextBox control.
MessageBox.Show Function
- Displays a message box with customizable text, caption, buttons, and icons.
Parameters
- text: Text to be displayed in the message box.
- caption: Text to be displayed in the message box's title bar.
- buttons: Specifies which buttons to display.
- icon: Sets the icon to display in the message box.
Return Value
- One of the DialogResult values, indicating the user's choice.
MessageBoxButtons Enumeration
- Defines the available buttons to display for the MessageBox.Show function.
MessageBoxIcon Enumeration
- Defines the available icons to display in the message box.
DialogResult Enumeration
- Defines the possible return values from a MessageBox.Show function.
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