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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Aug 6, 1999



Application Security Testing: An Integral Part of DevOps

Do Easy Form-Level Keystroke Trapping

If you set a form's KeyPreview property to True, all keystrokes for items on that form first trigger the form's events. This makes it easy to do form-level filtering and keystroke trapping. For example, if you want to make all text boxes on a form force uppercase entry, you can do it with three lines of executable code:

Private Sub Form_KeyPress(KeyAscii As Integer)
	If KeyAscii >= 97 And KeyAscii <= 122 _
		Then 'a-z
		KeyAscii = KeyAscii - 32
	End If
End Sub

Ron Schwarz
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