请问高手们这段代码是用来屏蔽什么的?屏蔽PageUP,PageDown'************ Code Start **********Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)'33 - PgUp; 34 - PgDown; 9 - Tab; 18=Alt Select Case KeyCode Case 33, 34, 9, 18 KeyCode = 0 Case Else 'Debug.Print KeyCode, Shift End SelectEnd Sub