Library code snippets
Detect if a particular .exe is running
By Yew Chin Sing, published on 04 Dec 2003
Declare all coding in one module
'Constants
Public Const TH32CS_SNAPHEAPLIST = &H1
Public Const TH32CS_SNAPPROCESS = &H2
Public Const TH32CS_SNAPTHREAD = &H4
Public Const TH32CS_SNAPMODULE = &H8
Public Const TH32CS_SNAPALL = (TH32CS_SNAPHEAPLIST Or TH32CS_SNAPPROCESS Or TH32CS_SNAPTHREAD Or TH32CS_SNAPMODULE)
Public Const TH32CS_INHERIT = &H80000000
Public Const MAX_PATH As Integer = 260
'Type
Public 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
'API Declaration
Public Declare Function CreateToolhelp32Snapshot Lib "kernel32" (ByVal lFlags As Long, ByVal lProcessID As Long) As Long
Public Declare Function Process32First Lib "kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Public Declare Function Process32Next Lib "kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Put all code below into Form
Private Sub Form_Load()
Dim hSnapShot As Long, uProcess As PROCESSENTRY32
Dim r As Long
lstProcess.Clear
'Takes a snapshot of the processes and the heaps, modules, and threads used by the processes
hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPALL, 0&)
'set the length of our ProcessEntry-type
uProcess.dwSize = Len(uProcess)
'Retrieve information about the first process encountered in our system snapshot
r = Process32First(hSnapShot, uProcess)
Do While r
lstProcess.AddItem left$(uProcess.szExeFile, IIf(InStr(1, uProcess.szExeFile, Chr$(0)) > 0, InStr(1, uProcess.szExeFile, Chr$(0)) - 1, 0))
'Retrieve information about the next process recorded in our system snapshot
r = Process32Next(hSnapShot, uProcess)
Loop
'close our snapshot handle
CloseHandle hSnapShot
'MsgBox lstProcess.ListCount
'search .exe in lstProcess (Listbox)
Dim hj As Integer
hj = 1
For hj = 1 To lstProcess.ListCount
If (lstProcess.List(hj) = "EXCEL.EXE") Then
MsgBox "Microsoft Excel was running"
Exit Sub
End If
Next hj
End Sub
In addition, you need one ListBox named as lstProcess
Enjoy it,
Hope this help you...
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