CHAPTER 4- Lesson C
- 1. Hello! I am Ma. Wennilou Porazo 1
- 3. After studying Lesson C, you should be able to: ● Prevent the entry of unwanted characters in a text. ● Select the existing text in a textbox. 3
- 4. Coding the KeyPress Event Procedures 4
- 5. Coding the KeyPress Event Procedures (cont.) 5
- 6. Coding the Enter Event Procedures 6
- 7. Coding the KeyPress Event Procedures (cont.) 7
- 8. Coding the KeyPress Event Procedures (cont.) 8
- 9. 9
- 10. 10
- 11. Lesson C, Summary: ● The KeyPress event occurs when the user presses a key. ● Use the KeyPress event to cancel an unwanted key pressed by the user. ● Use the SelectAll method to select all contents of a text box. 11
- 12. Lesson C, Summary (cont.) ● The Enter event occurs when the textbox receives the focus. ● Use the Enter event to process code when the control receives the focus. 12
- 13. Lesson C, Summary (cont. ● To allow a text box to accept only certain keys: ○ Code the text box’s KeyPress event procedure. Th e key the user pressed is stored in the e.KeyChar property. You use the e.Handled = True instruction to cancel the key pressed by the user. 13
- 14. Lesson C, Summary (cont.) ● To select the existing text in a text box: ○ Use the SelectAll method. Th e method’s syntax is textbox.SelectAll(). ● To process code when a control receives the focus: ○ Enter the code in the control’s Enter event procedure 14
- 15. Reference ● Book ○ Programming with Microsoft Visual Basic 2010, 5th edition ○ Author: Diane Zak 15
- 16. Thanks! 16