I used to be able to run command lines running external programs (like exiftool or image magick) with the function below in my access 2007 db. I migrated to access 2013 and after a few code adaptations, the DB works, except this function ExecCmd. When I use it I get no error but nothing happens.
Can anyone help ? Either by showing me whats wrong or suggesting a better way to do the same.
Public Const SEE_MASK_DOENVSUBST As Long = &H200
Public Const SEE_MASK_IDLIST As Long = &H4
Public Const SEE_MASK_NOCLOSEPROCESS As Long = &H40
Public Const SW_HIDE As Long = 0
Public Const SW_SHOW As Long = 5
Public Const WAIT_TIMEOUT As Long = 258&
Public Type SHELLEXECUTEINFOA
cbSize As Long
fMask As Long
hwnd As Long
lpVerb As String
lpFile As String
lpParameters As String
lpDirectory As String
nShow As Long
hInstApp As Long
lpIDList As Long
lpClass As String
hkeyClass As Long
dwHotKey As Long
hIcon As Long
hProcess As Long
End Type
Public Declare PtrSafe Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
Public Declare PtrSafe Function GetExitCodeProcess Lib "kernel32.dll" (ByVal hProcess As Long, ByRef lpExitCode As Long) As Long
Public Declare PtrSafe Function ShellExecuteEx Lib "shell32.dll" (ByRef lpExecInfo As SHELLEXECUTEINFOA) As Long
Public Declare PtrSafe Function WaitForSingleObject Lib "kernel32.dll" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Public Function ExecCmd(ByVal vsCmdLine As String, Optional ByRef vsParameters As String, Optional ByRef vsCurrentDirectory As String = vbNullString, Optional ByVal vnShowCmd As Long = SW_SHOW, Optional ByVal vnTimeOut As Long = 200) As Long
Dim lpShellExInfo As SHELLEXECUTEINFOA
With lpShellExInfo
.cbSize = Len(lpShellExInfo)
.lpDirectory = vsCurrentDirectory
.lpVerb = "open"
.lpFile = vsCmdLine
.lpParameters = vsParameters
.nShow = vnShowCmd
.fMask = SEE_MASK_DOENVSUBST Or SEE_MASK_NOCLOSEPROCESS Or SEE_MASK_IDLIST
End With
If ShellExecuteEx(lpShellExInfo) Then
Do While WaitForSingleObject(lpShellExInfo.hProcess, vnTimeOut) = WAIT_TIMEOUT
DoEvents
Loop
GetExitCodeProcess lpShellExInfo.hProcess, ExecCmd
CloseHandle lpShellExInfo.hProcess
Else
ExecCmd = vbError
End If
End Function
I found another similar function, but the first one was better, if only because It had the ability to run the command hidden. This works:
Option Explicit
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 Long
hStdInput As Long
hStdOutput As Long
hStdError As Long
End Type
Private Type PROCESS_INFORMATION
hProcess As Long
hThread As Long
dwProcessID As Long
dwThreadID As Long
End Type
Private Declare PtrSafe Function WaitForSingleObject Lib "kernel32" (ByVal _
hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Declare PtrSafe Function CreateProcessA Lib "kernel32" (ByVal _
lpApplicationName As Long, ByVal lpCommandLine As String, ByVal _
lpProcessAttributes As Long, ByVal lpThreadAttributes As Long, _
ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, _
ByVal lpEnvironment As Long, ByVal lpCurrentDirectory As Long, _
lpStartupInfo As STARTUPINFO, lpProcessInformation As _
PROCESS_INFORMATION) As Long
Private Declare PtrSafe Function CloseHandle Lib "kernel32" (ByVal _
hObject As Long) As Long
Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const INFINITE = -1&
Public Sub ExecCmd(cmdline As String)
Dim proc As PROCESS_INFORMATION
Dim start As STARTUPINFO
Dim ReturnValue As Integer
' Initialize the STARTUPINFO structure:
start.cb = Len(start)
' Start the shelled application:
ReturnValue = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, _
NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc)
' Wait for the shelled application to finish:
Do
ReturnValue = WaitForSingleObject(proc.hProcess, 0)
DoEvents
Loop Until ReturnValue <> 258
ReturnValue = CloseHandle(proc.hProcess)
End Sub