A.Public Sub Sum(x,y) B.Public Sub Sum(ByVal x, ByVal y) C.Public Sub Sum(x As Integer,y As Integer) D.Public Sub Sum(x%, y%)
A.Interval B.Value C.Enabled D.Text
A.建立用戶界面 B.編寫源程序代碼 C.畫圖 D.顯示文字