Vba 如何制作if条件？

我想知道是否可以设置一个If条件来检查变量“a”是否包含字符串“pass”，然后打印错误消息

dim a as string
a = textbox1.text
if a = "pass" then
label1.text = "Error: you can't use the word PASS in your password"
end if

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不过，这个问题是重复的

dim a as string
a = textbox1.text
if InStr("fkvnfdpassknfd", "pass") > 0 then
label1.text = "Error: you can't use the word PASS in your password"
end if