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
Public Function IsEXERunning(ByVal sFilename As String) As Boolean
    Dim lSnapshot As Long
    Dim uProcess As PROCESSENTRY32
    Dim nResult As Long
 
    IsEXERunning = False
    ' "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
 
 
 
 
 
Private Sub Command1_Click()
 
    Dim AppRun As Boolean
 
    If IsEXERunning("winword.exe") Then AppRun = True 'z.B. WinWord
 
    If AppRun = True Then MsgBox "Anwendungen beenden!"
End Sub