Visual Basic Tips


VBから起動したプログラムを終了させる(API)


VBから起動したアプリケーションを呼び出し元のVBから終了させます。
CreateProcessで起動するバージョンとShellを使って起動する2バージョンを掲載してあります。
Shellを使う方法は、長らくWin9xでのみ動作し
NTでは上手く動作しないものを掲載していましたが、
AKAISHIさんからご教授頂きどちらでも動くものに変更することができました。AKAISHIさん情報ありがとうございました。

'-------------------------------------------------------
' CreateProcess使用
'-------------------------------------------------------
Private Sub Command1_Click()
  Dim udtProcInfo As PROCESS_INFORMATION
  Dim udtStartInfo As STARTUPINFO
  Dim lngret As Long

  udtStartInfo.cb = LenB(udtStartInfo)
  lngret = CreateProcess(vbNullString, "calc.exe", ByVal 0&, ByVal 0&, 1&, NORMAL_PRIORITY_CLASS, ByVal 0&, vbNullString, udtStartInfo, udtProcInfo)

  MsgBox "[電卓] を終了させます"

  Call TerminateProcess(udtProcInfo.hProcess, 0&)
  Call CloseHandle(udtProcInfo.hThread)
  Call CloseHandle(udtProcInfo.hProcess)
End Sub

'-------------------------------------------------------
' Shell使用
'-------------------------------------------------------
Private Sub Command2_Click()
  Dim lngProcessID As Long
  Dim hProcess As Long

  lngProcessID = Shell("calc.exe", vbNormalFocus)
  hProcess = OpenProcess(SYNCHRONIZE Or PROCESS_TERMINATE, True, lngProcessID)

  MsgBox "[電卓] を終了させます"

  Call TerminateProcess(hProcess, 0&)
  Call CloseHandle(hProcess)
End Sub

'-------------------------------------------------------
' Module
'-------------------------------------------------------
Public Type PROCESS_INFORMATION
  hProcess As Long
  hThread As Long
  dwProcessId As Long
  dwThreadId As Long
End Type

Public Type STARTUPINFO
  cb As Long
  lpReserved As String
  lpDesktop As String
  lpTitle As String
  dwX As Long
  dwY As Long
  dwXSize As Long
  dwYSize As Long
  dwXCountChars As Long
  dwYCountChars As Long
  dwFillAttribute As Long
  dwFlags As Long
  wShowWindow As Integer
  cbReserved2 As Integer
  lpReserved2 As Long
  hStdInput As Long
  hStdOutput As Long
  hStdError As Long
End Type

Public Declare Function CreateProcess Lib "kernel32" Alias "CreateProcessA" (ByVal lpApplicationName As String, ByVal lpCommandLine As String, lpProcessAttributes As Any, lpThreadAttributes As Any, ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, lpEnvironment As Any, ByVal lpCurrentDriectory As String, lpStartupInfo As STARTUPINFO, lpProcessInformation As PROCESS_INFORMATION) As Long

Public Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwAccess As Long, ByVal fInherit As Integer, ByVal hObject As Long) As Long

Public Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long

Public Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Public Const SYNCHRONIZE = 1048576
Public Const NORMAL_PRIORITY_CLASS = &H20&
Public Const PROCESS_TERMINATE = &H1


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