Public Function CheckBIG(strSource As String) As Boolean
Dim idx As Long
Dim ByteTemp() As Byte
CheckBIG = False
For idx = 1 To Len(strSource)
　　ByteTemp = StrConv(Mid(strSource, idx, 1), vbFromUnicode)
　　If UBound(ByteTemp) > 0 Then
　　　　If (ByteTemp(1) >= 64) And (ByteTemp(1) <= 126) Then
　　　　　　CheckBIG = True
　　　　　　Exit For
　　　　End If
　　End If
Next idx
End Function