转化一下就可以,以下代码测试通过:
Private Declare Function MultiByteToWideChar Lib "kernel32" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpMultiByteStr As Long, ByVal cchMultiByte As Long, ByVal lpWideCharStr As Long, ByVal cchWideChar As Long) As Long
Private Const CP_UTF8 = 65001
Private Function Utf8ToUnicode(ByRef Utf() As Byte) As String
    Dim lRet As Long
    Dim lLength As Long
    Dim lBufferSize As Long
    lLength = UBound(Utf) - LBound(Utf) + 1
    If lLength <= 0 Then Exit Function
    lBufferSize = lLength * 2
    Utf8ToUnicode = String$(lBufferSize, Chr(0))
    lRet = MultiByteToWideChar(CP_UTF8, 0, VarPtr(Utf(0)), lLength, StrPtr(Utf8ToUnicode), lBufferSize)
    If lRet <> 0 Then
        Utf8ToUnicode = Left(Utf8ToUnicode, lRet)
    Else
        Utf8ToUnicode = ""
End If
End Function
Private Sub Command1_Click()
    Dim aa() As Byte
    Dim t As String, t1 As String, t2 As String
    aa = Inet1.OpenURL(Text1.Text, icByteArray)      'URL在Text1里输入
    If IsUTF8(aa) Then
        t = Utf8ToUnicode(aa)
    Else
        t = StrConv(aa, vbUnicode)
End If
    t1 = InStr(t, "<title>") + Len("<title>")
t2 = InStr(t, "</title>")
    Text2.Text = Mid(t, t1, t2 - t1)
End Sub
 '判断网页编码函数
Private Function IsUTF8(Bytes) As Boolean
    Dim i As Long, AscN As Long, Length As Long
    Length = UBound(Bytes) + 1
    If Length < 3 Then
        IsUTF8 = False
        Exit Function
    ElseIf Bytes(0) = &HEF And Bytes(1) = &HBB And Bytes(2) = &HBF Then
        IsUTF8 = True
        Exit Function
    End If
    Do While i <= Length - 1
        If Bytes(i) < 128 Then
            i = i + 1
            AscN = AscN + 1
        ElseIf (Bytes(i) And &HE0) = &HC0 And (Bytes(i + 1) And &HC0) = &H80 Then
            i = i + 2
        ElseIf i + 2 < Length Then
            If (Bytes(i) And &HF0) = &HE0 And (Bytes(i + 1) And &HC0) = &H80 And (Bytes(i + 2) And &HC0) = &H80 Then
                 i = i + 3
            Else
                IsUTF8 = False
                Exit Function
            End If
        Else
            IsUTF8 = False
            Exit Function
        End If
    Loop
    If AscN = Length Then
        IsUTF8 = False
    Else
        IsUTF8 = True
    End If
End Function