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in a readerDeclaring 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.
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) |
| CloseClipboard |
Declare PtrSafe Function
CloseClipboard Lib "User32" ()
As LongPtr
Declare Function CloseClipboard Lib "User32" () As Long |
| 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 |
| DrawMenuBar |
#If VBA7 Then
Public Declare PtrSafe Function DrawMenuBar Lib "user32" (ByVal hWnd As LongPtr) As Long #Else Public Declare Function DrawMenuBar Lib "user32" (ByVal hWnd As Long) As Long #End If |
| EmptyClipboard |
Declare PtrSafe Function
EmptyClipboard Lib "User32" ()
As LongPtr
Declare Function EmptyClipboard Lib "User32" () As Long |
| 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 |
| 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 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 |
| 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 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 LongPtr 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 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" (ByVal hWnd As LongPtr, ByVal nIndex As Long) As LongPtr #Else Private Declare PtrSafe Function GetWindowLongPtr Lib "USER32" Alias "GetWindowLongA" (ByVal hWnd As LongPtr, ByVal nIndex As Long) As LongPtr #End If #Else Private Declare Function GetWindowLong 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 |
| GlobalAlloc |
Declare PtrSafe Function
GlobalAlloc Lib "kernel32" (ByVal
wFlags As LongPtr,
ByVal dwBytes As
LongPtr) As LongPtr
Declare Function GlobalAlloc Lib "kernel32" (ByVal wFlags As Long, ByVal dwBytes As Long) As Long |
| GlobalLock |
Declare PtrSafe Function
GlobalLock Lib "kernel32" (ByVal
hMem As LongPtr)
As LongPtr
Declare Function GlobalLock Lib "kernel32" (ByVal hMem As Long) 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 |
| lstrcopy |
Declare PtrSafe Function
lstrcpy Lib "kernel32" (ByVal
lpString1 As Any,
ByVal lpString2
As Any) As
LongPtr
Declare Function lstrcpy Lib "kernel32" (ByVal lpString1 As Any, ByVal lpString2 As Any) As Long |
| Mouse_Event |
#If VBA7 Then
Declare PtrSafe Sub mouse_event Lib "user32" (ByVal dwFlags As Long, ByVal dx As Long, _ ByVal dy As Long, ByVal cButtons As Long, _ ByVal dwExtraInfo As LongPtr) #Else Private Declare Sub mouse_event Lib "user32" (ByVal dwFlags As Long, ByVal dx As Long, _ ByVal dy As Long, ByVal cButtons As Long, _ ByVal dwExtraInfo As Long) #End If Private Const MOUSEEVENTF_MOVE = &H1 ' mouse move |
| 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 |
| OpenClipboard |
Declare PtrSafe Function
OpenClipboard Lib "User32" (ByVal
hwnd As LongPtr)
As LongPtr
Declare Function OpenClipboard Lib "User32" (ByVal hwnd As Long) As Long |
| 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 Long
Declare PtrSafe Function SetActiveWindow Lib "user32.dll" (ByVal hWnd As LongPtr) As LongPtr |
| SetClipboardData |
Declare PtrSafe Function
SetClipboardData Lib "User32" (ByVal
wFormat As LongPtr,
ByVal hMem As
LongPtr) As
LongPtr
Declare Function SetClipboardData Lib "User32" (ByVal wFormat As Long, ByVal hMem As Long) As Long |
| 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 SetWindowLong Lib "USER32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long #End If |
| SetWindowPos |
#If VBA7 Then
Private Declare PtrSafe Function SetWindowPos _ Lib "user32" (ByVal hwnd As LongPtr, ByVal hWndInsertAfter As LongPtr, _ ByVal X As Long, ByVal Y As Long, ByVal cx As Long, _ ByVal cy As Long, ByVal wFlags As Long) As Long #Else Private Declare Function SetWindowPos _ Lib "user32" (ByVal hwnd As Long, _ ByVal hWndInsertAfter As Long, _ ByVal X As Long, ByVal Y As Long, _ ByVal cx As Long, _ ByVal cy As Long, _ ByVal wFlags 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 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 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 |
#If VBA7 Then
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 LongPtr abID As Byte End Type #Else Private Declare Function SHGetSpecialFolderLocation Lib _ "shell32.dll" (ByVal hwndOwner As Long, ByVal nFolder As Long, _ pidl As ITEMIDLIST) As Long Private Type SHITEMID cb As Long abID As Byte End Type #End If 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 |
| URLDownloadToFile |
#If VBA7 Then
Private Declare PtrSafe Function URLDownloadToFile Lib "urlmon" _ Alias "URLDownloadToFileA" (ByVal pCaller As Long, _ ByVal szURL As String, ByVal szFileName As String, _ ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long #Else Private Declare Function URLDownloadToFile Lib "urlmon" _ Alias "URLDownloadToFileA" (ByVal pCaller As Long, _ ByVal szURL As String, ByVal szFileName As String, _ ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long #End If |
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
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 LongPtr, lParam As Any) As LongPtr
ByVal wParam As LongPtr, 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 argument wMsg is used to pass data, so 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
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)
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 292 in total (Show All Comments):Comment by: Tony Matyas (23-10-2018 19:42:50)
2. Similarly the last SetWindowLong declaration referring to elder Office Versions:
Comment by: Jan Karel Pieterse (24-10-2018 09:42:21)
Corrected, thanks!
Comment by: Joe (29-10-2018 07:13:00)
I'm still stuck though: I have a third party 32bit DLL which just contain math and file functions.
On my Win7(x64) with Excel 2010 (32bit) it all works as it should. On a Win10(x64) with Excel 2016 (64bit) even using Public Declare PtrSafe... I get cannot find entry point, or sometimes a DLL not found error!
#If VBA7 Then
Private Declare PtrSafe Function LearningRate Lib "crunch.dll" (ByVal nIndex As Long, ByVal nWeight As Long, ByVal nFocus as Long) As Double
#Else
Private Declare Function LearningRate Lib "crunch.dll" (ByVal nIndex As Long, ByVal nWeight As Long, ByVal nFocus as Long) As Double
#End If
I have copies of the .dll file in both C:\Windows\System32 and C:\Windows\SysWOW64 although I'm not sure if the file needs to be in both locations? (My understanding is that System32 is (confusingly) for the 64bit DLLs and SysWOW64 is where the 32bit DLLs are kept?)
Can I call the functions from a "simple" 32bit DLL from 64bit VBA?
Any help would really be appreciated.
Joe.
Comment by: Jan Karel Pieterse (29-10-2018 11:10:27)
In theory you cannot call 32 bit dll's from 64 bit VBA. But I seem to recall there is a convoluted win API work-around for it. Unfortunately I was not able to locate the demo file I thought I had on my system somewhere :-(
Comment by: A K (9-11-2018 03:17:12)
Comment by: Jan Karel Pieterse (9-11-2018 11:30:00)
Most of these have been tested. Many of them come directly from the mentioned documentation by Microsoft.
I'm afraid I must disagree with your comment that most of them are wrong, I think they are correct. If any of these actually fail on 64 bit Office I'd like to know.
Comment by: Daniel (29-4-2019 20:11:00)
Comment by: Jan Karel Pieterse (30-4-2019 09:08:00)
Thanks for letting me know, I have replaced the link to point to an alternative source.
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