September 15, 2016 admin

Declaring API Functions In 64 Bit Office

API

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.

Many of the declarations were figured out by Charles Williams of www.decisionmodels.com when he created the 64 bit version of our Name Manager.

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)

Last, but certainly not least: Dennis Walentin has built an API viewer that is really helpful. You can find the API viewer here.

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 LongDeclare 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 LongPtrConst INFINITE = &HFFFF
Const STARTF_USESHOWWINDOW = &H1
Private Enum enSW
SW_HIDE = 0
SW_NORMAL = 1
SW_MAXIMIZE = 3
SW_MINIMIZE = 6
End EnumPrivate 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) AsBoolean

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, ByVallpWindowName As String) As Long

Private
Declare PtrSafe Function FindWindow Lib “USER32″ Alias “FindWindowA” (ByVal lpClassName AsString, 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 LongPrivateDeclare 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 AsLong, 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 AsGdiplusStartupInput, Optional ByVal outputbuf As LongPtr = 0) As LongPtrPrivate 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 LongPublic Declare PtrSafe Function GetClassName Lib “USER32″ Alias “GetClassNameA” _
(ByVal hWnd As LongPtr, ByVal lpClassName As String, _
ByVal nMaxCount As LongPtr) As Long
GetDiskFreeSpaceEx
Private Declare Function GetDiskFreeSpaceEx Lib “kernel32″ _
Alias “GetDiskFreeSpaceExA” (ByVal lpDirectoryName As String, _
lpFreeBytesAvailableToCaller As Currency, _
lpTotalNumberOfBytes As Currency, _
lpTotalNumberOfFreeBytes As Currency) As Long
Private Declare PtrSafe Function GetDiskFreeSpaceEx Lib “kernel32″ Alias _
“GetDiskFreeSpaceExA” (ByVal lpDirectoryName As String, _
lpFreeBytesAvailableToCaller As Currency, lpTotalNumberOfBytes As _
Currency, lpTotalNumberOfFreeBytes As Currency) As LongPtr
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 LongPublic 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 LongPrivate Declare PtrSafe Function GetDriveType Lib “kernel32″ Alias _
“GetDriveTypeA” (ByVal sDrive As String) As LongPtr
GetExitCodeProcess
#If VBA7 Then
Declare PtrSafe Function GetExitCodeProcess Lib “kernel32″ (ByVal _
hProcess As LongPtr, lpExitCode As Long) As Long
#Else
Declare Function GetExitCodeProcess Lib “kernel32″ (ByVal _
hProcess As Long, lpExitCode As Long) As Long
#End If
GetForegroundWindow
Declare Function GetForegroundWindow Lib “user32.dll” () As LongDeclare 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 LongPublic 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 LongDeclare 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 AsCurrency) As Long

Private
Declare PtrSafe Function getTickCount Lib “kernel32″ Alias “QueryPerformanceCounter” (cyTickCountAs 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 LongPublic Declare PtrSafe FunctionGetWindow Lib “USER32″ _
(ByVal hWnd As LongPtr, ByVal wCmd As Long) 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” (ByValhWnd As LongPtr, ByVal nIndex As Long) As LongPtr
#Else
    Private Declare PtrSafe Function GetWindowLongPtr Lib “USER32″ Alias “GetWindowLongA” (ByVal hWndAs 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 LongPublic 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 BooleanPublic 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 AsGUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As LongPrivate 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, RefIIDAs GUID, ByVal fPictureOwnsHandle As LongPtr, IPic As IPicture) As LongPtrPrivate Type PICTDESC
Size As Long
Type As Long
hPic As LongPtr
hPal As LongPtr
End Type
OpenProcess
#If VBA7 Then
Declare PtrSafe Function OpenProcess Lib “kernel32″ (ByVal _
dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal _
dwProcessId As Long) As LongPtr
#Else
Declare Function OpenProcess Lib “kernel32″ (ByVal _
dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal _
dwProcessId As Long) As Long
#End If
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 LongDeclare 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” (ByValhWnd As LongPtr, ByVal nIndex As Long, ByVal dwNewLong As LongPtr) As LongPtr
#Else
    Private Declare Function SetWindowLongPtr Lib “USER32″ Alias “SetWindowLongA” (ByVal hWnd AsLongPtr, 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 TypePrivate Declare PtrSafe Function SHBrowseForFolder Lib “shell32.dll” Alias “SHBrowseForFolderA” _
(lpBrowseInfo As BROWSEINFO) As LongPtr
#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 TypePrivate 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 BooleanPrivate 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 LongPrivate 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!

 

Autor

JKP – Application Development Services

http://www.jkp-ads.com/articles/apideclarations.asp

 

 

Fale Conosco