process - VB6 如何检查进程 ID 是否已终止

Question

我需要知道进程 ID 是否存在。到目前为止的代码:

Option Explicit

Dim WshShell As Object
Dim EngineRun As Object

Sub main()

Set WshShell = CreateObject("WScript.Shell")
Set EngineRun = WshShell.Exec("notepad.exe")

MsgBox EngineRun.ProcessID

If EngineRun.ProcessID = True Then
    WshShell.run "TASKKILL /F /IM " & EngineRun.ProcessID, , True
    MsgBox EngineRun.ProcessID & (" terminated")
Else
    MsgBox EngineRun.ProcessID & (" does not exist")
End If
End Sub

如果我取出“If”语句并让它打开记事本并显示一个带有进程 ID 的 MsgBox，那么当我单击 MsgBox 的“确定”时，它将成功杀死记事本

但是使用“If”语句，无论记事本是否打开，它都会显示“不存在”MsgBox。如果它是打开的，它会成功杀死它，然后显示“不存在”MsgBox，而不是“已终止”MsgBox。

任何想法都非常感谢!

Answer 1

尝试这个

Option Explicit

Dim WshShell As Object
Dim EngineRun As Object
Dim objWMIService As Object
Dim colProcessList As Object

Sub Main

   Set WshShell = CreateObject("WScript.Shell")
   Set EngineRun = WshShell.Exec("notepad.exe")

   MsgBox EngineRun.ProcessID

   Set objWMIService = GetObject("winmgmts:\\.\root\cimv2")
   Set colProcessList = objWMIService.ExecQuery("Select * from Win32_Process Where ProcessID = " & EngineRun.ProcessID)

   If colProcessList.Count = 1 Then
       WshShell.run "TASKKILL /F /IM " & EngineRun.ProcessID, , True
       MsgBox EngineRun.ProcessID & (" terminated")
   Else
       MsgBox EngineRun.ProcessID & (" does not exist")
   End If

End Sub