Code does not work on 64 bit Office

Question

I should figure out problem with excel VBA code compatibility on 64bit systems. I do not use VB language and code below is not my but I have to solve that issue.

Excel VB code:

Option Explicit

Private Declare Function WideCharToMultiByte Lib "kernel32.dll" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpWideCharStr As Long, ByVal cchWideChar As Long, ByRef lpMultiByteStr As Byte, ByVal cchMultiByte As Long, ByVal lpDefaultChar As String, ByRef lpUsedDefaultChar As Long) As Long

Private Const CP_UTF8 As Long = 65001
Private Const ERROR_INSUFFICIENT_BUFFER As Long = 122&


Public Function ToUTF8(s As String) As Byte()

  If Len(s) = 0 Then Exit Function


  Dim ccb As Long
  ccb = WideCharToMultiByte(CP_UTF8, 0, StrPtr(s), Len(s), ByVal 0&, 0, vbNullString, ByVal 0&)

  If ccb = 0 Then
    Err.Raise 5, , "Internal error."
  End If

  Dim b() As Byte
  ReDim b(1 To ccb)

  If WideCharToMultiByte(CP_UTF8, 0, StrPtr(s), Len(s), b(LBound(b)), ccb, vbNullString, ByVal 0&) = 0 Then
    Err.Raise 5, , "Internal error."
  Else
    ToUTF8 = b
  End If

End Function

I have tried to add conditions #If VBA7 and PtrSave to everywhere but worksheet still does not work.

This is the code that I tried in Office 64 Bit

    Option Explicit

    #If VBA7 Then
    Private Declare PtrSafe Function WideCharToMultiByte Lib "kernel32" (ByVal CodePage As Integer, ByVal dwFlags As Long, ByVal lpWideCharStr As LongPtr, ByVal cchWideChar As Long, ByVal lpMultiByteStr As Long, ByVal cchMultiByte As LongPtr, ByVal lpDefaultChar As Long, ByVal lpUsedDefaultChar As Long) As LongPtr
    #Else
Private Declare Function WideCharToMultiByte Lib "kernel32.dll" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpWideCharStr As Long, ByVal cchWideChar As Long, ByRef lpMultiByteStr As Byte, ByVal cchMultiByte As Long, ByVal lpDefaultChar As String, ByRef lpUsedDefaultChar As Long) As Long
    #EndIf

    Private Const CP_UTF8 As Long = 65001
    Private Const ERROR_INSUFFICIENT_BUFFER As Long = 122&


    Public Function ToUTF8(s As String) As Byte()

      If Len(s) = 0 Then Exit Function


      Dim ccb As LongPtr
      ccb = WideCharToMultiByte(CP_UTF8, 0, StrPtr(s), Len(s), ByVal 0&, 0, vbNullString, ByVal 0&)

      If ccb = 0 Then
        Err.Raise 5, , "Internal error."
      End If

      Dim b() As Byte
      ReDim b(1 To ccb) // ERROR TYPE MISMATCH on ccb

      If WideCharToMultiByte(CP_UTF8, 0, StrPtr(s), Len(s), b(LBound(b)), ccb, vbNullString, ByVal 0&) = 0 Then
        Err.Raise 5, , "Internal error."
      Else
        ToUTF8 = b
      End If

    End Function

Thanks for help.

Answer 1

(Untested)

Change

---

This

Private Declare PtrSafe Function WideCharToMultiByte Lib "kernel32" _
(ByVal CodePage As Integer, ByVal dwFlags As Long, ByVal lpWideCharStr _
As LongPtr, ByVal cchWideChar As Long, ByVal lpMultiByteStr As Long, _
ByVal cchMultiByte As LongPtr, ByVal lpDefaultChar As Long, _
ByVal lpUsedDefaultChar As Long) As LongPtr

To

Private Declare PtrSafe Function WideCharToMultiByte Lib "Kernel32" ( _
ByVal CodePage As LongPtr, ByVal dwflags As LongPtr, _
ByVal lpWideCharStr As LongPtr, ByVal cchWideChar As LongPtr, _
ByVal lpMultiByteStr As LongPtr, ByVal cchMultiByte As LongPtr, _
ByVal lpDefaultChar As LongPtr, ByVal lpUsedDefaultChar As LongPtr) As LongPtr

---

This

Private Const CP_UTF8 As Long = 65001

To

Private Const CP_UTF8 = 65001

---

This

Private Const ERROR_INSUFFICIENT_BUFFER As Long = 122&

To

Private Const ERROR_INSUFFICIENT_BUFFER = 122&

---

This

Dim ccb As LongPtr

To

Dim ccb As Variant

In the last three chnages that I suggested, we are declaring them as Variants because we don't know what the type will be on different systems. It will either be Long or LongPtr