開發指南
VB6

VB6代碼示例
Attribute VB_Name = "UTF8"
Private Declare Function WideCharToMultiByte Lib "kernel32" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpWideCharStr As Long, ByVal cchWideChar As Long, ByRef lpMultiByteStr As Any, ByVal cchMultiByte As Long, ByVal lpDefaultChar As String, ByVal lpUsedDefaultChar As Long) As Long
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 Const CP_ACP As Long = 0

'接口類型：達信通語音通知接口。
'賬戶注冊：請通過該地址開通賬戶http://sms.wx96.com/register.html
'注意事項：
'（1）調試期間，請仔細閱讀接口文檔；
'（2）請使用APIID（查看APIID請登錄用戶中心->語音通知->帳戶及簽名設置->APIID）及 APIkey來調用接口
'（3）該代碼僅供接入達信通語音通知接口參考使用，客戶可根據實際需要自行編寫；

Public Function toUTF8(szInput)
     Dim wch, uch, szRet
     Dim x
     Dim nAsc, nAsc2, nAsc3
     '如果輸入參數為空，則退出函數
     If szInput = "" Then
         toUTF8 = szInput
         Exit Function
     End If
     '開始轉換
      For x = 1 To Len(szInput)
         '利用mid函數分拆GB編碼文字
         wch = Mid(szInput, x, 1)
         '利用ascW函數返回每一個GB編碼文字的Unicode字符代碼
         '注：asc函數返回的是ANSI 字符代碼，注意區別
         nAsc = AscW(wch)
         If nAsc < 0 Then nAsc = nAsc + 65536
    
         If (nAsc And &HFF80) = 0 Then
             szRet = szRet & wch
         Else
             If (nAsc And &HF000) = 0 Then
                 uch = "%" & Hex(((nAsc \ 2 ^ 6)) Or &HC0) & Hex(nAsc And &H3F Or &H80)
                 szRet = szRet & uch
             Else
                'GB編碼文字的Unicode字符代碼在0800 - FFFF之間采用三字節模版
                 uch = "%" & Hex((nAsc \ 2 ^ 12) Or &HE0) & "%" & _
                             Hex((nAsc \ 2 ^ 6) And &H3F Or &H80) & "%" & _
                             Hex(nAsc And &H3F Or &H80)
                 szRet = szRet & uch
             End If
         End If
     Next
     toUTF8 = szRet
     
     toUTF8 = Replace(toUTF8, Chr(13) + Chr(10), "%0D%0A")
     toUTF8 = Replace(toUTF8, " ", "%20")
     toUTF8 = Replace(toUTF8, "+", "%2B")

End Function



Public 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)
    End If
End Function

Public Function URLEncode(vstrIn)
   strReturn = ""
   Dim i
   For i = 1 To Len(vstrIn)
   ThisChr = Mid(vstrIn, i, 1)
   If Abs(Asc(ThisChr)) < &HFF Then
   strReturn = strReturn & ThisChr
   Else
   innerCode = Asc(ThisChr)
  If innerCode < 0 Then
  innerCode = innerCode + &H10000
  End If
  Hight8 = (innerCode And &HFF00) \ &HFF
  Low8 = innerCode And &HFF
  strReturn = strReturn & "%" & Hex(Hight8) & "%" & Hex(Low8)
  End If
  Next
  strReturn = Replace(strReturn, Chr(32), "%20")
  strReturn = Replace(strReturn, "+", "%2B")
  strReturn = Replace(strReturn, " ", "+")
  strReturn = Replace(strReturn, vbCrLf, "%0D%0A")
  strReturn = Replace(strReturn, "#", "%23")
  URLEncode = strReturn
End Function