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Problemstellung:

Wie kann ich mit Access prüfen, ob ein bestimmtes Programm bereits läuft?
Lösung mittels API Funktionen

Private Declare Function CreateToolhelpSnapshot Lib _
                          "Kernel32" Alias "CreateToolhelp32Snapshot" ( _
                          ByVal lFlgas As Long, ByVal lProcessID As Long) As Long
 
Private Declare Function ProcessFirst Lib "Kernel32" _
                          Alias "Process32First" (ByVal hSnapshot As Long, _
                          uProcess As PROCESSENTRY32) As Long
 
Private Declare Function ProcessNext Lib "Kernel32" _
                          Alias "Process32Next" (ByVal hSnapshot As Long, _
                          uProcess As PROCESSENTRY32) As Long
 
Private Declare Sub CloseHandle Lib "Kernel32" (ByVal hPass As Long)
 
Private Const TH32CS_SNAPPROCESS As Long = 2&
 Private Const MAX_PATH As Long = 260
 
Private Type PROCESSENTRY32
     dwSize As Long
     cntUsage As Long
     th32ProcessID As Long
     th32DefaultHeapID As Long
     th32ModuleID As Long
     cntThreads As Long
     th32ParentProcessID As Long
     pcPriClassBase As Long
     dwflags As Long
     szexeFile As String * MAX_PATH
 End Type
 
' Prüft, ob eine EXE-Datei bereits ausgeführt wird
 Private Function IsEXERunning(ByVal sFilename As String) As Long
 
    Dim lSnapshot As Long
     Dim uProcess As PROCESSENTRY32
     Dim nResult As Long
 
    ' "Snapshot" des aktuellen Prozess ermitteln
     lSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
     If lSnapshot <> 0 Then
         uProcess.dwSize = Len(uProcess)
 
        ' Ersten Prozess ermitteln
         nResult = ProcessFirst(lSnapshot, uProcess)
 
        Do Until nResult = 0
             ' Prozessliste durchlaufen
             If InStr(LCase$(uProcess.szexeFile), LCase$(sFilename)) > 0 Then
                 ' Jepp - EXE gefunden
                 IsEXERunning = True
                 Exit Do
             End If
 
            ' nächster Prozess
             nResult = ProcessNext(lSnapshot, uProcess)
         Loop
 
        ' Handle schliessen
         CloseHandle lSnapshot
     End If
End Function

Aufruf:

Dim AppRun As Boolean
 If IsEXERunning("winword.exe") Then AppRun = True 'z.B. WinWord 

Die Variable "AppRun" würde den Wert True annehmen wenn Word bereits läuft.

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21. Mai 2018