如何检测是否按下了特定键? [英] How to detect if a specific key was pressed?

问题描述

我想知道是否有一种方法可以检测是否按下了特定键(例如退格键).这就是我要拍摄的内容:

I'm wondering is there a way to detect if a specific key (like backspace) was pressed. This is what I'm shooting for:

Private Sub SomeTextBox_Change()

    If len(Me.SomeTextBox.Value) = 3 and KEYPRESSED is NOT BACKSPACE Then
         <.......Code Here>
    Else
         <.......Code Here>
    End if

End Sub

推荐答案

您应该使用KeyPress事件而不是Change事件:

You should use KeyPress event instead of Change event:

Private Sub TextBox1_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)

    If Len(Me.SomeTextBox.Value) = 3 And KeyAscii <> 8 Then 'Backspace has keycode = 8.
         <.......Code Here>
    Else
         <.......Code Here>
    End If

End Sub

您可以在此处找到完整的键控代码列表: http://www.asciitable.com/

Full list of keycodes you can find here: http://www.asciitable.com/

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