Most Valuable Professional


View Jan Karel Pieterse's profile on LinkedIn subscribe to rss feed
Subscribe in a reader

Audit !!!

Check out our RefTreeAnalyser
the ultimate Excel formula auditing tool.

Speed up your file

FastExcel
The best tool to optimise your Excel model!
Home > English site > Articles > API declarations

Declaring API functions in 64 bit Office

Introduction

With the introduction of Windows 7 and Office 2010 VBA developers face a new challenge: ensuring their applications work on both 32 bit and 64 bit platforms.

This page is meant to become the first stop for anyone who needs the proper syntax for his API declaration statement in Office VBA.

Most of the declarations placed here when I first wrote the article were figured out by Charles Williams of www.decisionmodels.com when he created the 64 bit version of our Name Manager (to be published soon).

Links

Of course Microsoft documents how to do this. There is an introductory article on Microsoft MSDN:

Compatibility Between the 32-bit and 64-bit Versions of Office 2010

That article describes the how-to's to properly write the declarations. What is missing is which type declarations go with which API function or sub.

Microsoft has provided an updated version of the Win32API.txt with all proper declarations available for download here:

Office 2010 Help Files: Win32API_PtrSafe with 64-bit Support

When you run the installer after downloading the file form the link above, it does not tell you where it installed the information. Look in this -new- folder on your C drive:

C:\Office 2010 Developer Resources\Documents\Office2010Win32API_PtrSafe

You can find a list of the old Win32 API declarations here:

Visual Basic Win32 API Declarations

Microsoft also published a tool to check your code for 64 bit related problems, called the Microsoft Office Code Compatibility inspector addin.

API functions that were added/modified in 64-bit Windows: http://msdn.microsoft.com/en-us/library/aa383663(VS.85).aspx

API Functions by Windows release:

 http://msdn.microsoft.com/en-us/library/aa383687(VS.85).aspx

Utter Access API declarations (a comprehensive list of many declarations)

Declarations by API function

Function name Declarations (32 bit followed by 64 bit)
CreateProcess We start off with a complicated one because it has a lot of arguments. A fully functional example is included below the example declaration lines.
Courtesy: The example code was taken from this page

     Declare Function CreateProcess Lib "kernel32" _
                                   Alias "CreateProcessA" (ByVal lpApplicationName As String, _
                                                           ByVal lpCommandLine As String, _
                                                           lpProcessAttributes As SECURITY_ATTRIBUTES, _
                                                           lpThreadAttributes As SECURITY_ATTRIBUTES, _
                                                           ByVal bInheritHandles As Long, _
                                                           ByVal dwCreationFlags As Long, _
                                                           lpEnvironment As Any, _
                                                           ByVal lpCurrentDriectory As String, _
                                                           lpStartupInfo As STARTUPINFO, _
                                                           lpProcessInformation As PROCESS_INFORMATION) As Long


    Declare PtrSafe Function CreateProcess Lib "kernel32" _
                                   Alias "CreateProcessA" (ByVal lpApplicationName As String, _
                                                           ByVal lpCommandLine As String, _
                                                           lpProcessAttributes As SECURITY_ATTRIBUTES, _
                                                           lpThreadAttributes As SECURITY_ATTRIBUTES, _
                                                           ByVal bInheritHandles As Long, _
                                                           ByVal dwCreationFlags As Long, _
                                                           lpEnvironment As Any, _
                                                           ByVal lpCurrentDriectory As String, _
                                                           lpStartupInfo As STARTUPINFO, _
                                                           lpProcessInformation As PROCESS_INFORMATION) As LongPtr

'Full example shown below, including the necessary structures
#If VBA7 Then
    Declare PtrSafe Function CreateProcess Lib "kernel32" _
                                   Alias "CreateProcessA" (ByVal lpApplicationName As String, _
                                                           ByVal lpCommandLine As String, _
                                                           lpProcessAttributes As SECURITY_ATTRIBUTES, _
                                                           lpThreadAttributes As SECURITY_ATTRIBUTES, _
                                                           ByVal bInheritHandles As Long, _
                                                           ByVal dwCreationFlags As Long, _
                                                           lpEnvironment As Any, _
                                                           ByVal lpCurrentDriectory As String, _
                                                           lpStartupInfo As STARTUPINFO, _
                                                           lpProcessInformation As PROCESS_INFORMATION) As LongPtr

    Const INFINITE = &HFFFF
    Const STARTF_USESHOWWINDOW = &H1
Private Enum enSW
    SW_HIDE = 0
    SW_NORMAL = 1
    SW_MAXIMIZE = 3
    SW_MINIMIZE = 6
End Enum

Private Type PROCESS_INFORMATION
    hProcess As LongPtr
    hThread As LongPtr
    dwProcessId As Long
    dwThreadId As Long
End Type

Private Type STARTUPINFO
    cb As Long
    lpReserved As String
    lpDesktop As String
    lpTitle As String
    dwX As Long
    dwY As Long
    dwXSize As Long
    dwYSize As Long
    dwXCountChars As Long
    dwYCountChars As Long
    dwFillAttribute As Long
    dwFlags As Long
    wShowWindow As Integer
    cbReserved2 As Integer
    lpReserved2 As Byte
    hStdInput As LongPtr
    hStdOutput As LongPtr
    hStdError As LongPtr
End Type

Private Type SECURITY_ATTRIBUTES
    nLength As Long
    lpSecurityDescriptor As LongPtr
    bInheritHandle As Long
End Type

Private Enum enPriority_Class
    NORMAL_PRIORITY_CLASS = &H20
    IDLE_PRIORITY_CLASS = &H40
    HIGH_PRIORITY_CLASS = &H80
End Enum
#Else
    Declare Function CreateProcess Lib "kernel32" _
                                   Alias "CreateProcessA" (ByVal lpApplicationName As String, _
                                                           ByVal lpCommandLine As String, _
                                                           lpProcessAttributes As SECURITY_ATTRIBUTES, _
                                                           lpThreadAttributes As SECURITY_ATTRIBUTES, _
                                                           ByVal bInheritHandles As Long, _
                                                           ByVal dwCreationFlags As Long, _
                                                           lpEnvironment As Any, _
                                                           ByVal lpCurrentDriectory As String, _
                                                           lpStartupInfo As STARTUPINFO, _
                                                           lpProcessInformation As PROCESS_INFORMATION) As Long

    Const INFINITE = &HFFFF
    Const STARTF_USESHOWWINDOW = &H1
Private Enum enSW
    SW_HIDE = 0
    SW_NORMAL = 1
    SW_MAXIMIZE = 3
    SW_MINIMIZE = 6
End Enum

Private Type PROCESS_INFORMATION
    hProcess As Long
    hThread As Long
    dwProcessId As Long
    dwThreadId As Long
End Type

Private Type STARTUPINFO
    cb As Long
    lpReserved As String
    lpDesktop As String
    lpTitle As String
    dwX As Long
    dwY As Long
    dwXSize As Long
    dwYSize As Long
    dwXCountChars As Long
    dwYCountChars As Long
    dwFillAttribute As Long
    dwFlags As Long
    wShowWindow As Integer
    cbReserved2 As Integer
    lpReserved2 As Byte
    hStdInput As Long
    hStdOutput As Long
    hStdError As Long
End Type

Private Type SECURITY_ATTRIBUTES
    nLength As Long
    lpSecurityDescriptor As Long
    bInheritHandle As Long
End Type

Private Enum enPriority_Class
    NORMAL_PRIORITY_CLASS = &H20
    IDLE_PRIORITY_CLASS = &H40
    HIGH_PRIORITY_CLASS = &H80
End Enum
#End If

Private Function SuperShell(ByVal App As String, ByVal WorkDir As String, dwMilliseconds As Long, _
                            ByVal start_size As enSW, ByVal Priority_Class As enPriority_Class) As Boolean


    Dim pclass As Long
    Dim sinfo As STARTUPINFO
    Dim pinfo As PROCESS_INFORMATION
    'Not used, but needed
    Dim sec1 As SECURITY_ATTRIBUTES
    Dim sec2 As SECURITY_ATTRIBUTES
    'Set the structure size
    sec1.nLength = Len(sec1)
    sec2.nLength = Len(sec2)
    sinfo.cb = Len(sinfo)
    'Set the flags
    sinfo.dwFlags = STARTF_USESHOWWINDOW
    'Set the window's startup position
    sinfo.wShowWindow = start_size
    'Set the priority class
    pclass = Priority_Class

    'Start the program
    If CreateProcess(vbNullString, App, sec1, sec2, False, pclass, _
                     0&, WorkDir, sinfo, pinfo) Then
        'Wait
       ' WaitForSingleObject pinfo.hProcess, dwMilliseconds
        SuperShell = True
    Else
        SuperShell = False
    End If
End Function

Sub Test()
    Dim sFile As String
    'Set the dialog's title
    sFile = Application.GetOpenFilename("Executables (*.exe), *.exe", , "")
    SuperShell sFile, Left(sFile, InStrRev(sFile, "\")), 0, SW_NORMAL, HIGH_PRIORITY_CLASS
End Sub
FindWindow
Private Declare Function FindWindow Lib "USER32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Private
Declare PtrSafe Function FindWindow Lib "USER32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As LongPtr
FindWindowEx
Private Declare Function FindWindowEx Lib "USER32" _
                                  Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, _
                                  ByVal lpsz1 As String, ByVal lpsz2 As String) As Long

Private
Declare PtrSafe Function FindWindowEx Lib "USER32" _
                                  Alias "FindWindowExA" (ByVal hWnd1 As LongPtr, ByVal hWnd2 As LongPtr, _
                                  ByVal lpsz1 As String, ByVal lpsz2 As String) As LongPtr
GdipCreateBitmapFromFile
Private Declare Function GdipCreateBitmapFromFile Lib "GDIPlus" (ByVal filename As Long, bitmap As Long) As Long

Private Declare PtrSafe Function GdipCreateBitmapFromFile Lib "GDIPlus" (ByVal filename As LongPtr, bitmap As LongPtr) As LongPtr
GdipCreateHBITMAPFromBitmap
Private Declare Function GdipCreateHBITMAPFromBitmap Lib "GDIPlus" (ByVal bitmap As Long, hbmReturn As Long, ByVal background As Long) As Long

Private Declare PtrSafe Function GdipCreateHBITMAPFromBitmap Lib "GDIPlus" (ByVal bitmap As LongPtr, hbmReturn As LongPtr, ByVal background As Long) As LongPtr
GdipDisposeImage
Private Declare Function GdipDisposeImage Lib "GDIPlus" (ByVal image As Long) As Long

Private Declare PtrSafe Function GdipDisposeImage Lib "GDIPlus" (ByVal image As LongPtr) As LongPtr
GdiplusShutdown
Private Declare Function GdiplusShutdown Lib "GDIPlus" (ByVal token As Long) As Long

Private Declare PtrSafe Function GdiplusShutdown Lib "GDIPlus" (ByVal token As LongPtr) As LongPtr
GdiplusStartup
Private Declare Function GdiplusStartup Lib "GDIPlus" (token As Long, inputbuf As GdiplusStartupInput, Optional ByVal outputbuf As Long = 0) As Long
Private Type GdiplusStartupInput
    GdiplusVersion As Long
    DebugEventCallback As Long
    SuppressBackgroundThread As Long
    SuppressExternalCodecs As Long
End Type
    
Private Declare PtrSafe Function GdiplusStartup Lib "GDIPlus" (token As LongPtr, inputbuf As GdiplusStartupInput, Optional ByVal outputbuf As LongPtr = 0) As LongPtr

Private Type GdiplusStartupInput
    GdiplusVersion As Long
    DebugEventCallback As LongPtr
    SuppressBackgroundThread As Long
    SuppressExternalCodecs As Long
End Type
GetClassName
Public Declare Function GetClassName Lib "USER32" Alias "GetClassNameA" _
                                     (ByVal hWnd As Long, ByVal lpClassName As String, _
                                      ByVal nMaxCount As Long) As Long

Public Declare PtrSafe Function GetClassName Lib "USER32" Alias "GetClassNameA" _
                                     (ByVal hWnd As LongPtr, ByVal lpClassName As String, _
                                      ByVal nMaxCount As LongPtr) As Long
getDC
Private Declare Function GetDC Lib "USER32" (ByVal hWnd As Long) As Long

Private
Declare PtrSafe Function GetDC Lib "USER32" (ByVal hWnd As LongPtr) As LongPtr
GetDesktopWindow
Public Declare Function GetDesktopWindow Lib "USER32" () As Long

Public Declare PtrSafe Function GetDesktopWindow Lib "USER32" () As LongPtr
getDeviceCaps
Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hDC As Long, ByVal nIndex As Long) As Long

Private
Declare PtrSafe Function GetDeviceCaps Lib "gdi32" (ByVal hDC As LongPtr, ByVal nIndex As Long) As Long
GetDriveType
Private Declare Function GetDriveType Lib "kernel32" Alias _
                        "GetDriveTypeA" (ByVal sDrive As String) As Long

Private Declare PtrSafe Function GetDriveType Lib "kernel32" Alias _
                                "GetDriveTypeA" (ByVal sDrive As String) As LongPtr
GetForegroundWindow
Declare Function GetForegroundWindow Lib "user32.dll" () As Long

Declare PtrSafe Function GetForegroundWindow Lib "user32.dll" () As LongPtr
getFrequency
Declare Function getFrequency Lib "kernel32" Alias "QueryPerformanceFrequency" (cyFrequency As Currency) As Long

Private
Declare PtrSafe Function getFrequency Lib "kernel32" Alias "QueryPerformanceFrequency" (cyFrequency As Currency) As Long
GetKeyState
Declare Function GetKeyState Lib "USER32" (ByVal vKey As Long) As Integer

Declare
PtrSafe Function GetKeyState Lib "USER32" (ByVal vKey As Long) As Integer
GetLastInputInfo
#If VBA7 Then
    Private Type LASTINPUTINFO
        cbSize As LongPtr
        dwTime As LongPtr
    End Type
    Private Declare PtrSafe Sub GetLastInputInfo Lib "USER32" (ByRef plii As LASTINPUTINFO)
#Else
    Private Type LASTINPUTINFO
        cbSize As Long
        dwTime As Long
    End Type
    Private Declare Sub GetLastInputInfo Lib "USER32" (ByRef plii As LASTINPUTINFO)
#End If
GetOpenFileName
Option Explicit

#If VBA7 Then
    Public Declare PtrSafe Function GetOpenFileName Lib "comdlg32.dll" Alias _
            "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
      
    Public Type OPENFILENAME
        lStructSize As Long
        hwndOwner As LongPtr
        hInstance As LongPtr
        lpstrFilter As String
        lpstrCustomFilter As String
        nMaxCustFilter As Long
        nFilterIndex As Long
        lpstrFile As String
        nMaxFile As Long
        lpstrFileTitle As String
        nMaxFileTitle As Long
        lpstrInitialDir As String
        lpstrTitle As String
        flags As Long
        nFileOffset As Integer
        nFileExtension As Integer
        lpstrDefExt As String
        lCustData As Long
        lpfnHook As LongPtr
        lpTemplateName As String
    End Type
  
#Else

    Public Declare Function GetOpenFileName Lib "comdlg32.dll" Alias _
            "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
      
    Public Type OPENFILENAME
        lStructSize As Long
        hwndOwner As Long
        hInstance As Long
        lpstrFilter As String
        lpstrCustomFilter As String
        nMaxCustFilter As Long
        nFilterIndex As Long
        lpstrFile As String
        nMaxFile As Long
        lpstrFileTitle As String
        nMaxFileTitle As Long
        lpstrInitialDir As String
        lpstrTitle As String
        flags As Long
        nFileOffset As Integer
        nFileExtension As Integer
        lpstrDefExt As String
        lCustData As Long
        lpfnHook As Long
        lpTemplateName As String
    End Type
#End If
'/////////////////////////////////
'// End code GetOpenFileName    //
'/////////////////////////////////


Public Function GetMyFile(strTitle As String) As String

    Dim OpenFile    As OPENFILENAME
    Dim lReturn     As Long
  
    OpenFile.lpstrFilter = ""
    OpenFile.nFilterIndex = 1
    OpenFile.hwndOwner = 0
    OpenFile.lpstrFile = String(257, 0)
    #If VBA7 Then
        OpenFile.nMaxFile = LenB(OpenFile.lpstrFile) - 1
        OpenFile.lStructSize = LenB(OpenFile)
    #Else
        OpenFile.nMaxFile = Len(OpenFile.lpstrFile) - 1
        OpenFile.lStructSize = Len(OpenFile)
    #End If
    OpenFile.lpstrFileTitle = OpenFile.lpstrFile
    OpenFile.nMaxFileTitle = OpenFile.nMaxFile
    OpenFile.lpstrInitialDir = "C:\"
    OpenFile.lpstrTitle = strTitle
    OpenFile.flags = 0
    lReturn = GetOpenFileName(OpenFile)
  
    If lReturn = 0 Then
        GetMyFile = ""
    Else
        GetMyFile = Trim(Left(OpenFile.lpstrFile, InStr(1, OpenFile.lpstrFile, vbNullChar) - 1))
    End If
  
End Function

GetSystemMetrics
Private Declare Function GetSystemMetrics Lib "USER32" (ByVal nIndex As Long) As Long

Private
Declare PtrSafe Function GetSystemMetrics Lib "USER32" (ByVal nIndex As Long) As Long
GetTempPath
Declare Function GetTempPath Lib "kernel32" _
                             Alias "GetTempPathA" (ByVal nBufferLength As Long, _
                                                   ByVal lpbuffer As String) As Long

Declare PtrSafe Function GetTempPath Lib "kernel32" _
                             Alias "GetTempPathA" (ByVal nBufferLength As longptr, _
                                                   ByVal lpbuffer As String) As Long
getTickCount
Private Declare Function getTickCount Lib "kernel32" Alias "QueryPerformanceCounter" (cyTickCount As Currency) As Long

Private
Declare PtrSafe Function getTickCount Lib "kernel32" Alias "QueryPerformanceCounter" (cyTickCount As Currency) As Long
    '
getTime
Private Declare Function timeGetTime Lib "winmm.dll" () As Long

Private
Declare PtrSafe Function timeGetTime Lib "winmm.dll" () As Long
GetWindow
Public Declare Function GetWindow Lib "USER32" _
                                  (ByVal hWnd As Long, ByVal wCmd As Long) As Long

Public Declare PtrSafe Function GetWindow Lib "USER32" _
                                  (ByVal hWnd As LongPtr, ByVal wCmd As LongPtr) As LongPtr
GetWindowLong This is one of the few API functions that requires the Win64 compile constant:
#If VBA7 Then
    #If Win64 Then
        Private Declare PtrSafe Function GetWindowLongPtr Lib "USER32" Alias "GetWindowLongPtrA" (ByVal hWnd As LongPtr, ByVal nIndex As Long) As LongPtr
    #Else
        Private Declare Function GetWindowLongPtr Lib "USER32" Alias "GetWindowLongA" (ByVal hWnd As LongPtr, ByVal nIndex As Long) As LongPtr
    #End If
#Else
    Private Declare Function GetWindowLongPtr Lib "USER32" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
#End If
GetWindowsDirectory
Declare Function GetWindowsDirectory& Lib "kernel32" Alias _
                                      "GetWindowsDirectoryA" (ByVal lpbuffer As String, _
                                                              ByVal
nSize As Long)

Declare PtrSafe Function GetWindowsDirectory& Lib "kernel32" Alias _
                                      "GetWindowsDirectoryA" (ByVal lpbuffer As String, _
                                                              ByVal
nSize As LongPtr)
GetWindowText
Public Declare Function GetWindowText Lib "USER32" Alias "GetWindowTextA" _
                                      (ByVal hWnd As Long, ByVal lpString As String, _
                                       ByVal cch As Long) As Long

Public Declare PtrSafe Function GetWindowText Lib "USER32" Alias "GetWindowTextA" _
                                      (ByVal hWnd As LongPtr, ByVal lpString As String, _
                                       ByVal cch As LongPtr) As Long
InternetGetConnectedState
Public Declare Function InternetGetConnectedState _
        Lib "wininet.dll" (lpdwFlags As Long, _
        ByVal dwReserved As Long) As Boolean

Public Declare PtrSafe Function InternetGetConnectedState _
        Lib "wininet.dll" (lpdwFlags As LongPtr, _
        ByVal dwReserved As long) As Boolean
IsCharAlphaNumericA
Private Declare Function IsCharAlphaNumericA Lib "USER32" (ByVal byChar As Byte) As Long

Private
Declare PtrSafe Function IsCharAlphaNumericA Lib "USER32" (ByVal byChar As Byte) As Long
OleCreatePictureIndirect
Private Declare Function OleCreatePictureIndirect Lib "oleaut32.dll" (PicDesc As PICTDESC, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long

Private Type PICTDESC
    Size As Long
    Type As Long
    hPic As Long
    hPal As Long
End Type

Private Declare PtrSafe Function OleCreatePictureIndirect Lib "oleaut32.dll" (PicDesc As PICTDESC, RefIID As GUID, ByVal fPictureOwnsHandle As LongPtr, IPic As IPicture) As LongPtr

Private Type PICTDESC
    Size As Long
    Type As Long
    hPic As LongPtr
    hPal As LongPtr
End Type
ReleaseDC
Private Declare Function ReleaseDC Lib "USER32" (ByVal hWnd As Long, ByVal hDC As Long) As Long

Private
Declare PtrSafe Function ReleaseDC Lib "USER32" (ByVal hWnd As LongPtr, ByVal hDC As LongPtr) As Long
SendMessage
Public Declare Function SendMessageA Lib "user32" (ByVal hWnd As Long, ByVal wMsg As Long, _
                                                   ByVal wParam As Long, lParam As Any) As Long
Public Declare PtrSafe Function SendMessageA Lib "user32" (ByVal hWnd As LongPtr, ByVal wMsg As Long, _
                                                           ByVal wParam As LongPtr, lParam As Any) As LongPtr
SetActiveWindow
Declare Function SetActiveWindow Lib "user32.dll" (ByVal hWnd As Long) As Long

Declare PtrSafe Function SetActiveWindow Lib "user32.dll" (ByVal hWnd As LongPtr) As LongPtr
SetCurrentDirectory
Private Declare Function SetCurrentDirectoryA Lib "kernel32" (ByVal lpPathName As String) As Long

Private
Declare PtrSafe Function SetCurrentDirectoryA Lib "kernel32" (ByVal lpPathName As String) As Long
SetWindowLongPtr This is one of the few API functions that requires the Win64 compile constant:
#If VBA7 Then
    #If Win64 Then
        Private Declare PtrSafe Function SetWindowLongPtr Lib "USER32" Alias "SetWindowLongPtrA" (ByVal hWnd As LongPtr, ByVal nIndex As Long, ByVal dwNewLong As LongPtr) As LongPtr
    #Else
        Private Declare Function SetWindowLongPtr Lib "USER32" Alias "SetWindowLongA" (ByVal hWnd As LongPtr, ByVal nIndex As Long, ByVal dwNewLong As LongPtr) As LongPtr
    #End If
#Else
    Private Declare Function SetWindowLongPtr Lib "USER32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
#End If
SHBrowseForFolder
#If VBA7 Then
    Private Type BROWSEINFO
        hOwner As LongPtr
        pidlRoot As LongPtr
        pszDisplayName As String
        lpszTitle As String
        ulFlags As Long
        lpfn As LongPtr
        lParam As LongPtr
        iImage As Long
    End Type
                       
    Private Declare PtrSafe Function SHBrowseForFolder Lib "shell32.dll" Alias "SHBrowseForFolderA" _
        (lpBrowseInfo As BROWSEINFO) As Long
#Else
    Private Type BROWSEINFO
        hOwner As Long
        pidlRoot As Long
        pszDisplayName As String
        lpszTitle As String
        ulFlags As Long
        lpfn As Long
        lParam As Long
        iImage As Long
    End Type
                       
    Private Declare Function SHBrowseForFolder Lib "shell32.dll" Alias "SHBrowseForFolderA" _
        (lpBrowseInfo As BROWSEINFO) As Long
#End If
Private Const BIF_RETURNONLYFSDIRS = &H1
ShellExecute
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" ( _
        ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, _
        ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long

Private
Declare PtrSafe Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" ( _
        ByVal hwnd As LongPtr, ByVal lpOperation As String, ByVal lpFile As String, _
        ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As LongPtr
SHFileOperation
#If VBA7 Then
    Type SHFILEOPSTRUCT
        hWnd As LongPtr
        wFunc As Long
        pFrom As String
        pTo As String
        fFlags As Integer
        fAborted As Boolean
        hNameMaps As Longptr
        sProgress As String
    End Type
    Declare PtrSafe Function SHFileOperation Lib "shell32.dll" Alias "SHFileOperationA" _
                                     (lpFileOp As SHFILEOPSTRUCT) As LongPtr
#Else
    Type SHFILEOPSTRUCT
        hWnd As Long
        wFunc As Long
        pFrom As String
        pTo As String
        fFlags As Integer
        fAborted As Boolean
        hNameMaps As Long
        sProgress As String
    End Type
    Declare Function SHFileOperation Lib "shell32.dll" Alias "SHFileOperationA" _
                                     (lpFileOp As SHFILEOPSTRUCT) As Long
#End If
SHGetPathFromIDList
Private Declare Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" _
        (ByVal pidl As Long, ByVal pszPath As String) As Boolean

Private Declare PtrSafe Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" _
        (ByVal pidl As LongPtr, ByVal pszPath As String) As Boolean
SHGetSpecialFolderLocation
    Private Declare Function SHGetSpecialFolderLocation Lib _
        "shell32.dll" (ByVal hwndOwner As Long, ByVal nFolder As Long, _
        pidl As ITEMIDLIST) As Long

    Private Declare PtrSafe Function SHGetSpecialFolderLocation Lib _
        "shell32.dll" (ByVal hwndOwner As LongPtr, ByVal nFolder As Long, _
        pidl As ITEMIDLIST) As LongPtr

    Private Type SHITEMID
        cb As Long
        abID As Byte
     End Type
     Private Type ITEMIDLIST
        mkid As SHITEMID
     End Type
timeGetTime
Private Declare Function timeGetTime Lib "winmm.dll" () As Long

Private
Declare PtrSafe Function timeGetTime Lib "winmm.dll" () As Long

Which Longs should become LongPtr?

It's actually pretty easy to determine what requires LongPtr and what can stay as Long. The only things that require LongPtr are function arguments or return values that represent addresses in memory. This is because a 64-bit OS has a memory space that is too large to hold in a Long data type variable. Arguments or return values that represent data will still be declared Long even in 64-bit.

The SendMessage API is a good example because it uses both types:

32-bit:

Public Declare Function SendMessageA Lib "user32" (ByVal hWnd As Long, ByVal wMsg As Long, _
                                                   ByVal wParam As Long, lParam As Any) As Long

64 bit:

Public Declare PtrSafe Function SendMessageA Lib "user32" (ByVal hWnd As LongPtr, ByVal wMsg As Long, _
                                                           ByVal wParam As Long, lParam As Any) As LongPtr

The first argument -hWnd- is a window handle, which is an address in memory. The return value is a pointer to a function, which is also an address in memory. Both of these must be declared LongPtr in 64-bit VBA. The arguments wMsg and wParam are used to pass data, so they can be Long in both 32-bit and 64-bit.

How to determine what is a memory address and what is data? You just have to read the MSDN documentation for the API functions (the C++ version) and it will tell you. Anything called a handle, pointer, brush or any other object type will require a LongPtr in 64-bit. Anything that is strictly data can stay as Long.

Conditional compiling

If your code needs to run on both 32 bit and 64 bit Excel, then another thing to do is add conditional compilation to your VBA.

Microsoft devised two compile constants to handle this:

VBA7: True if you're using Office 2010, False for older versions

WIN64: True if your Office installation is 64 bit, false for 32 bit.

Since the 64 bit declarations also work on 32 bit Office 2010, all you have to test for is VBA7:

#If VBA7 Then
    Private Declare PtrSafe Function GetDeviceCaps Lib "gdi32" (ByVal hDC As LongPtr, ByVal nIndex As Long) As Long
#Else
    Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hDC As Long, ByVal nIndex As Long) As Long
#End If

And then in the routine where this function is put to use:

#If VBA7 Then
    Dim hDC As LongPtr
#Else
    Dim hDC As Long
#End If
Dim lDotsPerInch As Long
'Get the user's DPI setting
lDotsPerInch = GetDeviceCaps(hDC, LOGPIXELSX)

Other API functions

Have a function declaration which is not on this list? I invite you to send me your (working and tested!!!) declarations so I can add them here.

I also welcome comments and suggestions on improvements!


Comments

Showing last 8 comments of 150 in total (Show All Comments):

 


Comment by: George Marcovits (8/3/2013 9:24:53 AM)

VB]Sub ShowTitleBar(bShow As Boolean)
    Dim lStyle As Long
    Dim tRect As RECT
    Dim sWndTitle As String
    Dim xlhnd
    
    sWndTitle = "Microsoft Excel - " & ActiveWindow.Caption
    xlhnd = FindWindow(vbNullString, sWndTitle)
    GetWindowRect xlhnd, tRect
    If Not bShow Then
        lStyle = GetWindowLong(xlhnd, GWL_STYLE)
        lStyle = lStyle And Not WS_SYSMENU
        lStyle = lStyle And Not WS_MAXIMIZEBOX
        lStyle = lStyle And Not WS_MINIMIZEBOX
        lStyle = lStyle And Not WS_CAPTION
    Else
        lStyle = GetWindowLong(xlhnd, GWL_STYLE)
        lStyle = lStyle Or WS_SYSMENU
        lStyle = lStyle Or WS_MAXIMIZEBOX
        lStyle = lStyle Or WS_MINIMIZEBOX
        lStyle = lStyle Or WS_CAPTION
    End If
    SetWindowLong xlhnd, GWL_STYLE, lStyle
    SetWindowPos xlhnd, 0, tRect.Left, tRect.Top, tRect.Right - tRect.Left, tRect.Bottom - tRect.Top, SWP_NOREPOSITION Or SWP_NOZORDER Or SWP_FRAMECHANGED
End Sub


Sorry for the truncations into 3 messages

George

 


Comment by: Jan Karel Pieterse (8/8/2013 9:03:19 PM)

Hi George,

Thanks!!

 


Comment by: Jan Karel Pieterse (8/8/2013 9:04:11 PM)

Hi George,

The best way is to find womeone with 64 bit Excel to test this.

 


Comment by: Daniel Isoje (12/29/2013 8:33:10 PM)

Your post makes it all easy for me now. Before now the 32/64bit issues have been troubling my mind as an access developer.

Many thanks.

 


Comment by: Erwin Kalvelagen (3/19/2014 4:54:16 PM)

Just as a warning: I believe the file Win32API_PtrSafe.TXT contains some errors wrt Excel 64 bit. I got a few "Microsoft Excel has stopped working errors". Most are related to strings.

Here are some details:
http://social.msdn.microsoft.com/Forums/office/en-US/9ad49156-0d29-4c0c-ae30-8e7c11ccd8cf/win32apiptrsafetxt-better-version-available?forum=exceldev

 


Comment by: Thomas Dette (7/30/2014 10:44:41 AM)

Hi,
do you have a "64bit translation" for following APIs

Declare Function SleepEx Lib "kernel32" (ByVal dwMilliseconds As Long, ByVal bAlertable As Long) As Long

Declare Function MoveFileEx Lib "kernel32" Alias "MoveFileExA" (ByVal lpExistingFileName As String, ByVal lpNewFileName As String, ByVal dwFlags As Long) As Long

Declare Function sndPlaySound Lib "winmm.dll" snd dPlaySoundA" ByVal lpszSoundName As String, ByVal uFlags As Long) As Long

Declare Function WritePrivateProfileString& Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As Any, _
    ByVal lplFileName As String)
Declare Function GetPrivateProfileString& Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String)

Using ACCESS 2010 64bit.
Thanks for helping.
Thomas.

 


Comment by: Frank Barsnick (9/1/2014 1:37:24 PM)

Hi,
do you have a "64bit translation" for following APIs for reading an writing INI-files:

Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, lpKeyName As Any, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Integer, ByVal lpFileName As String) As Integer

Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, lpKeyName As Any, lpString As Any, ByVal lplFileName As String) As Integer

Private Declare Function DeletePrivateProfileSection Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal Section As String, ByVal NoKey As Long, ByVal NoSetting As Long, ByVal FileName As String) As Long


Thx for your help,
Frank

 


Comment by: Jan Karel Pieterse (9/1/2014 2:29:45 PM)

Hi Frank,

Sure:

Declare PtrSafe Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String) As Long

Declare PtrSafe Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As Any, ByVal lpFileName As String) As Long


I was unable to find the Delete one though!

 


Have a question, comment or suggestion? Then please use this form.

If your question is not directly related to this web page, but rather a more general "How do I do this" Excel question, then I advise you to ask your question here: www.eileenslounge.com.

Please enter your name (required):

Your e-mail address (optional but if you want me to respond it helps!; will not be shown, nor be used to send you unsolicited information):

Your request or comment:

To post VBA code in your comment, use [VB] tags, like this: [VB]Code goes here[/VB].