Show, expose, unhide all tasks/jobs/processes

I don't know about you, but I get very upset every time I find another uninvited program running on my PC.

I'm writing a little app to save 'snapshots' of the tasks/processes currently running on my system and then, later, compare them with what's currently running so I can quickly see if there's anything new going on.

My question is: how can I be sure I'm seeing EVERYTHING that's running?

I've seen a lot of effort here to hide tasks, using TaskVisible and APIs etc. If something like that is running on my PC I want to know.

Below is the code I'm using to list apps right now (from this site I'm sure)
Will this do it? Are there holes or 'opportunities' to improve on this?

Thanks, DaveBo

Code:

---

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)


Public Sub Show_All_Processes()
    Dim hSnapshot As Long
    Dim uProcess As PROCESSENTRY32
    Dim r As Long
    Dim strTmp As String
    Dim FirstNull As Integer

    hSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)

    If hSnapshot = 0 Then Exit Sub
    uProcess.dwSize = Len(uProcess)
    r = ProcessFirst(hSnapshot, uProcess)

    Do While r
        ' Find 1st NULL and remove it and everything following it
        strTmp = uProcess.szexeFile
        FirstNull = InStr(strTmp, Chr(0))
        strTmp = Left$(strTmp, FirstNull - 1)
        Debug.Print strTmp
        r = ProcessNext(hSnapshot, uProcess)
    Loop

    Call CloseHandle(hSnapshot)

End Sub

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Don't "System Idle Process" and "System" show up as null?
I don't think you would want to remove them.
Check out my last two posts in this thread.
You may want to get the executable name first before you start terminating processes.