1 Dim x 2 3 MsgBox IsNull(x) -----False 4 5 x = null 6 MsgBox IsNull(x) -----True 7 8 x = "11" 9 MsgBox IsNull(x) -----False
1 Dim x 2 3 MsgBox IsEmpty(x) -------True 4 5 x = null 6 MsgBox IsEmpty(x) -------Flase 7 8 x = "11" 9 MsgBox IsEmpty(x) -------False
原文:https://www.cnblogs.com/wqm94/p/15093448.html