Close a program

How do you terminate a program using its handle if isn't responding to windows. The postmessage command will not work.

If you know it's handle, use this code to return it's exe file path:

Code:

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'Author: Sam Huggill
'Author's email: http://www.programmerz.com/vb/
'Date Submitted: 2/6/1999
'Compatibility: VB 6,VB 5

'Task: Returns the .exe name from the given handle.

'Declarations
Public Const TH32CS_SNAPPROCESS As Long = 2&
Public Const MAX_PATH As Long = 260

Public 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

Public Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hWnd
As Long, lpdwProcessId As Long) As Long

Public Declare Function CreateToolhelpSnapshot Lib "Kernel32" Alias
"CreateToolhelp32Snapshot" (ByVal lFlgas As Long, ByVal lProcessID As
Long) As Long

Public Declare Function ProcessFirst Lib "Kernel32" Alias "Process32First"
(ByVal hSnapshot As Long, uProcess As PROCESSENTRY32) As Long

Public Declare Function ProcessNext Lib "Kernel32" Alias "Process32Next"
(ByVal hSnapshot As Long, uProcess As PROCESSENTRY32) As Long

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

Public Function GetExeFromHandle(hWnd As Long) As String
Dim threadID As Long, processID As Long, hSnapshot As Long
Dim uProcess As PROCESSENTRY32, rProcessFound As Long
Dim i As Integer, szExename As String
' Get ID for window thread
threadID = GetWindowThreadProcessId(hWnd, processID)
' Check if valid
If threadID = 0 Or processID = 0 Then Exit Function
' Create snapshot of current processes
hSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
' Check if snapshot is valid
If hSnapshot = -1 Then Exit Function
'Initialize uProcess with correct size
uProcess.dwSize = Len(uProcess)
'Start looping through processes
rProcessFound = ProcessFirst(hSnapshot, uProcess)
Do While rProcessFound
If uProcess.th32ProcessID = processID Then
'Found it, now get name of exefile
i = InStr(1, uProcess.szexeFile, Chr(0))
If i > 0 Then szExename = Left$(uProcess.szexeFile, i - 1)
Exit Do
Else
'Wrong ID, so continue looping
rProcessFound = ProcessNext(hSnapshot, uProcess)
End If
Loop
Call CloseHandle(hSnapshot)
GetExeFromHandle = szExename
End Function


Usage

Private Sub Command1_Click()
MsgBox GetExeFromHandle(Me.hWnd)
End Sub

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And then you can use this code to close the program by it's exe file path.

Code:

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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 Function CreateToolhelpSnapshot Lib "kernel32" _
Alias "CreateToolhelp32Snapshot" (ByVal lFlags As Long, _
lProcessID As Long) As Long

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

Private Declare Function OpenProcess Lib "kernel32" (ByVal _
dwDesiredAccess As Long, ByVal bInheritHandle As Long, _
ByVal dwProcessId As Long) As Long

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



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


Public Function KillApp(myName As String) As Boolean
    Const PROCESS_ALL_ACCESS = 0
    Dim uProcess As PROCESSENTRY32
    Dim rProcessFound As Long
    Dim hSnapshot As Long
    Dim szExename As String
    Dim exitCode As Long
    Dim myProcess As Long
    Dim AppKill As Boolean
    Dim appCount As Integer
    Dim i As Integer
    On Local Error GoTo Finish
    appCount = 0
   
    Const TH32CS_SNAPPROCESS As Long = 2&
   
    uProcess.dwSize = Len(uProcess)
    hSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
    rProcessFound = ProcessFirst(hSnapshot, uProcess)
   
    Do While rProcessFound
        i = InStr(1, uProcess.szexeFile, Chr(0))
        szExename = LCase$(Left$(uProcess.szexeFile, i - 1))
        If Right$(szExename, Len(myName)) = LCase$(myName) Then
            KillApp = True
            appCount = appCount + 1
            myProcess = OpenProcess(PROCESS_ALL_ACCESS, False, uProcess.th32ProcessID)
            AppKill = TerminateProcess(myProcess, exitCode)
            Call CloseHandle(myProcess)
        End If
        rProcessFound = ProcessNext(hSnapshot, uProcess)
    Loop

    Call CloseHandle(hSnapshot)
Finish:
End Function


Usage


Call KillApp("C:\Program.exe")

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What messages did you send with PostMessage?

Code:

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Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Function DestroyWindow Lib "user32" (ByVal hwnd As Long) As Long
Private Const WM_CLOSE = &H10

Private Sub Command1_Click()
    PostMessage hwnd_of_window, WM_CLOSE, 0, 0
    DestroyWindow hwnd_of_window
End Sub

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