检查何时按下箭头键？

Question

如何检查是否按下了箭头键（dunno，右键）？

Answer 1

只需在表单加载

上将KeyPreview属性设置为true即可

之后，您可以使用KeyDown / KeyPress事件。

    Private Sub main_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyUp
    '40 = ArrowkeyDown 38= ArrowKeyUp
    If Not e.KeyValue = 40 AndAlso Not e.KeyValue = 38 Then Exit Sub
    'Key Down / Up Code
End Sub