使用**向左**或**向左**获取字符串中最左边的 3 个字符
Const baseString As String = "Foo Bar"
Dim leftText As String
leftText = Left$(baseString, 3)
'leftText = "Foo"
Const baseString As String = "Foo Bar"
Dim leftText As String
leftText = Left$(baseString, 3)
'leftText = "Foo"