VB6 - Verificar se o aplicativo está sendo executado

 

Option Explicit

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

Private Declare Function CreateToolhelp32Snapshot Lib "Kernel32" (ByVal lFlags As Long, _

ByVal lProcessID As Long) As Long

Private Declare Function Process32First Lib "Kernel32" (ByVal hSnapShot As Long, _

typProcess As PROCESSENTRY32) As Long

Private Declare Function Process32Next Lib "Kernel32" (ByVal hSnapShot As Long, _

typProcess As PROCESSENTRY32) As Long

Private Declare Sub CloseHandle Lib "Kernel32" (ByVal hPass As Long)

Public Function AppIsRunning(ByVal AppName As String) As Boolean

Dim Process As PROCESSENTRY32

Dim hSnapShot As Long

Dim r As Long

AppName = LCase$(AppName)

hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0&)

If hSnapShot <> -1 Then

Process.dwSize = Len(Process)

r = Process32First(hSnapShot, Process)

Do While r

If LCase$(Left$(Process.szExeFile, InStr(1, Process.szExeFile, vbNullChar) - 1)) = AppName Then

AppIsRunning = True

r = False

End If

r = Process32Next(hSnapShot, Process)

Loop

CloseHandle hSnapShot

End If

End Function

'Uso

Private Sub Main()

MsgBox AppIsRunning("explorer.exe")

End Sub