Programming with Microsoft Visual Basic 2017, Loose-Leaf Version
8th Edition
ISBN: 9781337685733
Author: ZAK, Diane
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 4, Problem 4MQ9
Explanation of Solution
Value assigned to the e parameter’s Handled property to cancel the key pressed by the user:
If a key is pressed within a control (i.e. the control has been focused), then the KeyPress event will occur.
- The keyPress event procedure sends the pressed key’s value to the “e” parameter of the keyPress event.
- The acceptance of pressing key has been handled by using the property “Handled”.
e.Handled
- “Handled” property contains the Boolean values “True” or “False”.
- If the “Handled” property of the control is “true”, then the control cancels the pressed keys.
e.Handled=True
- If the “Handled” property of the control is “false”, then the control accepts the pressed keys.
e.Handled = False
Example:
The sub procedure “CancelKeys” allows the text boxes “txtCode” and “txtSales” to accept only the numbers and the backspace key...
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Chapter 4 Solutions
Programming with Microsoft Visual Basic 2017, Loose-Leaf Version
Ch. 4 - Prob. 1MQ1Ch. 4 - Prob. 2MQ1Ch. 4 - Prob. 3MQ1Ch. 4 - Prob. 1MQ2Ch. 4 - Prob. 2MQ2Ch. 4 - Prob. 3MQ2Ch. 4 - Prob. 4MQ2Ch. 4 - What is the opposite of greater than?Ch. 4 - Prob. 1MQ3Ch. 4 - Prob. 2MQ3
Ch. 4 - Prob. 3MQ3Ch. 4 - Prob. 4MQ3Ch. 4 - Prob. 1MQ4Ch. 4 - Prob. 2MQ4Ch. 4 - Prob. 3MQ4Ch. 4 - Prob. 1MQ5Ch. 4 - Prob. 2MQ5Ch. 4 - Prob. 3MQ5Ch. 4 - Prob. 1MQ6Ch. 4 - Jake’s Car Rental charges each customer a daily...Ch. 4 - Prob. 1MQ7Ch. 4 - Prob. 2MQ7Ch. 4 - Write a Case clause that specifies all numbers...Ch. 4 - Prob. 1MQ8Ch. 4 - Prob. 2MQ8Ch. 4 - Prob. 3MQ8Ch. 4 - A form contains six radio buttons. Three of the...Ch. 4 - Which property of the KeyPress procedures e...Ch. 4 - Which property of the KeyPress procedure’s e...Ch. 4 - Prob. 3MQ9Ch. 4 - Prob. 4MQ9Ch. 4 - Prob. 5MQ9Ch. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 10RQCh. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Use the code shown in Figure 4-54 to answer Review...Ch. 4 - Use the code shown in Figure 4-54 to answer Review...Ch. 4 - Use the code shown in Figure 4-54 to answer Review...Ch. 4 - Prob. 16RQCh. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - Prob. 19RQCh. 4 - Prob. 20RQCh. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - Prob. 25RQCh. 4 - It is customary in Windows applications to...Ch. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30RQCh. 4 - Prob. 31RQCh. 4 - Prob. 32RQCh. 4 - Prob. 33RQCh. 4 - Prob. 34RQCh. 4 - Which of the following statements is equivalent to...Ch. 4 - The six logical operators are listed below....Ch. 4 - An expression can contain arithmetic, comparison,...Ch. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - Prob. 3ECh. 4 - Prob. 7ECh. 4 - Prob. 11ECh. 4 - The purpose of this exercise is to demonstrate the...
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