by Chong Long Choo (4 Submissions)
Category: Windows System Services
Compatability: Visual Basic 3.0
Difficulty: Unknown Difficulty
Date Added: Wed 3rd February 2021
Rating: 
(2 Votes)
List All Active Processes (Class)
API DeclarationsOption Explicit
' Name: List All Active Processes
' Author: Chong Long Choo
' Email: [email protected]
' Date: 09 September 1999
'<--------------------------Disclaimer------------------------------->
'
'This sample is free. You can use the sample in any form. Use this
'sample at your own risk! I have no warranty for this sample.
'
'<--------------------------Disclaimer------------------------------->
'---------------------------------------------------------------------------------
'How to use
'---------------------------------------------------------------------------------
' Dim i As Integer
' Dim objItem As ListItem
' Dim NumOfProcess As Long
' Dim objActiveProcess As SQLSysInfo.clsActiveProcess
' Set objActiveProcess = New SQLSysInfo.clsActiveProcess
' NumOfProcess = objActiveProcess.GetActiveProcess
' For i = 1 To NumOfProcess
' Set objItem = ListView2.ListItems.Add(, , objActiveProcess.szExeFile(i))
' With objItem
' .SubItems(1) = objActiveProcess.th32ProcessID(i)
' .SubItems(2) = objActiveProcess.th32DefaultHeapID(i)
' .SubItems(3) = objActiveProcess.thModuleID(i)
' .SubItems(4) = objActiveProcess.cntThreads(i)
' .SubItems(5) = objActiveProcess.th32ParentProcessID(i)
' End With
' Next
' Set objActiveProcess = Nothing
Private Const TH32CS_SNAPPROCESS As Long = 2&
Private Const MAX_PATH As Integer = 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
Private Declare Function CreateToolhelpSnapshot Lib "kernel32" Alias "CreateToolhelp32Snapshot" (ByVal lFlags 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)
Dim ListOfActiveProcess() As PROCESSENTRY32
VBcodersPublic Function szExeFile(ByVal Index As Long) As String
szExeFile = ListOfActiveProcess(Index).szExeFile
End Function
Public Function dwFlags(ByVal Index As Long) As Long
dwFlags = ListOfActiveProcess(Index).dwFlags
End Function
Public Function pcPriClassBase(ByVal Index As Long) As Long
pcPriClassBase = ListOfActiveProcess(Index).pcPriClassBase
End Function
Public Function th32ParentProcessID(ByVal Index As Long) As Long
th32ParentProcessID = ListOfActiveProcess(Index).th32ParentProcessID
End Function
Public Function cntThreads(ByVal Index As Long) As Long
cntThreads = ListOfActiveProcess(Index).cntThreads
End Function
Public Function thModuleID(ByVal Index As Long) As Long
thModuleID = ListOfActiveProcess(Index).th32ModuleID
End Function
Public Function th32DefaultHeapID(ByVal Index As Long) As Long
th32DefaultHeapID = ListOfActiveProcess(Index).th32DefaultHeapID
End Function
Public Function th32ProcessID(ByVal Index As Long) As Long
th32ProcessID = ListOfActiveProcess(Index).th32ProcessID
End Function
Public Function cntUsage(ByVal Index As Long) As Long
cntUsage = ListOfActiveProcess(Index).cntUsage
End Function
Public Function dwSize(ByVal Index As Long) As Long
dwSize = ListOfActiveProcess(Index).dwSize
End Function
Public Function GetActiveProcess() As Long
Dim hToolhelpSnapshot As Long
Dim tProcess As PROCESSENTRY32
Dim r As Long, i As Integer
hToolhelpSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
If hToolhelpSnapshot = 0 Then
GetActiveProcess = 0
Exit Function
End If
With tProcess
.dwSize = Len(tProcess)
r = ProcessFirst(hToolhelpSnapshot, tProcess)
ReDim Preserve ListOfActiveProcess(20)
Do While r
i = i + 1
If i Mod 20 = 0 Then ReDim Preserve ListOfActiveProcess(i + 20)
ListOfActiveProcess(i) = tProcess
r = ProcessNext(hToolhelpSnapshot, tProcess)
Loop
End With
GetActiveProcess = i
Call CloseHandle(hToolhelpSnapshot)
End Function
