Como posso listar todos os processos em execução? Mais ou menos como aquela lista que aparece na guia Processos quando a gente aperta Ctrl+Alt+Del no XP.

 

Obrigado.

tente isso:

 

'Em um módulo:

Public Const GW_CHILD = 5
Public Const GW_HWNDNEXT = 2

Public Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hWnd As Long, ByVal lpString As String, ByVal aint As Long) As Long
Public Declare Function GetWindow Lib "user32" (ByVal hWnd As Long, ByVal wCmd As Long) As Long
Public Declare Function GetDesktopWindow Lib "user32" () As Long

Em sua procedure:

    Dim AntHwnd As Long, Classe As Long, JHwnd As Long, TamNome As Long
    Dim NomeClasse As String, NomeJanela As String
       
    NomeClasse = Space$(255)
   
    AntHwnd = GetDesktopWindow()
    JHwnd = GetWindow(AntHwnd, GW_CHILD)
   
    Do Until JHwnd = 0
        NomeJanela = Space$(255)
        TamNome = GetWindowText(JHwnd, NomeJanela, 128)
        NomeJanela = Left$(Trim$(NomeJanela), TamNome)

        List1.AddItem NomeJanela     <--- Aqui eu pressuponho que você usa uma List, se usar outra coisa, basta alterar esta linha

 

        AntHwnd = JHwnd
        JHwnd = GetWindow(AntHwnd, GW_HWNDNEXT)
    Loop

 

Este código apresenta todas as janelas de alto nível do Windows.

Depois de ler alguns códigos prontos e consultar uma documentação das APIs, consegui montar um código como eu queria. Aí vai pra caso alguém precise:

 

Private Const TH32CS_SNAPALL = &HF

Private Const PROCESS_ALL_ACCESS As Long = &H1F0FFF

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 * 260
End Type

 

Private Declare Function CreateToolhelp32Snapshot Lib "kernel32" (ByVal lFlags As Long, ByVal lProcessID As Long) As Long
Private Declare Function Process32Min Lib "kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function Process32Next Lib "kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function OpenProcess Lib "Kernel32.dll" (ByVal dwDesiredAccessas As Long, ByVal bInheritHandle As Long, ByVal dwProcId As Long) As Long
Private Declare Function GetModuleFileNameExA Lib "PSAPI.DLL" (ByVal hProcess As Long, ByVal hModule As Long, ByVal ModuleName As String, ByVal nSize As Long) As Long
Private Declare Function EnumProcessModules Lib "PSAPI.DLL" (ByVal hProcess As Long, ByRef lphModule As Long, ByVal cb As Long, ByRef cbNeeded As Long) As Long
Private Declare Sub CloseHandle Lib "kernel32" (ByVal hPass As Long)

 

Public Sub ListarProcessos()
    Dim ListaP As Long, DadosP As PROCESSENTRY32
    Dim R As Long, ExeNome As String, Phnd As Long
    Dim Modulos(255) As Long, Tamanho As Long
    Dim Cod As Long
    ListaP = CreateToolhelp32Snapshot(TH32CS_SNAPALL, 0)
    If ListaP > -1 Then
        DadosP.dwSize = Len(DadosP)
        R = Process32Min(ListaP, DadosP)
        If R Then
            While R
                Phnd = OpenProcess(PROCESS_ALL_ACCESS, 0, DadosP.th32ProcessID)
                If EnumProcessModules(Phnd, Modulos(0), 256, Tamanho) <> 0 Then
                    ExeNome = String$(256, Chr$(0))
                    GetModuleFileNameExA Phnd, Modulos(0), ExeNome, 256
                    ExeNome = Replace(ExeNome, Chr$(0), "")
                    '

                    ' ExeNome é o caminho completo do programa

                    ' Aqui entra o código que você quiser

                    '

                End If
                CloseHandle Phnd
                R = Process32Next(ListaP, DadosP)
            Wend
        End If
        CloseHandle ListaP
    End If
End Sub