Private Sub TextBox7_KeyPress(ByVal sender 清空As Object, ByVal e 答斗瞎As System.Windows.Forms.KeyPressEventArgs) Handles TextBox7.KeyPress
Dim c As Char
销谈 c = e.KeyChar
If Not Char.IsLetterOrDigit(c) Then
e.Handled = True
Beep()
End If
End Sub
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