Unauthorized Applications 2

Alt255 · Feb 3, 2000

This may seem like a silly question to some of the more seasoned pros in this forum but my app needs a way to identify every app running on a 9x system and a way to "terminate with judicial prejudice" any unauthorized apps it finds (without shutting-down or otherwise crashing the system). 
What calls are made by the Windows "Close Program" box that allow a graceful termination of the selected application? 
 
Mike? DougP? Edderic?

DougP · Feb 3, 2000

I think you will find every thing you need in here. 
Now at first glance you'll say I'm not using nor do I care about Excel but it shows how to get a program and control it and close it. Also look in the Knowledge base for FindWindow API calls. 
 
This example uses the GetObject function to get a reference to a specific Microsoft Excel worksheet (MyXL). It uses the worksheet's Application property to make Microsoft Excel visible, to close it, and so on. Using two API calls, the DetectExcel Sub procedure looks for Microsoft Excel, and if it is running, enters it in the Running Object Table. The first call to GetObject causes an error if Microsoft Excel isn't already running. In the example, the error causes the ExcelWasNotRunning flag to be set to True. The second call to GetObject specifies a file to open. If Microsoft Excel isn't already running, the second call starts it and returns a reference to the worksheet represented by the specified file, mytest.xls. The file must exist in the specified location; otherwise, the Visual Basic error Automation error is generated. Next the example code makes both Microsoft Excel and the window containing the specified worksheet visible. Finally, if there was no previous version of Microsoft Excel running, the code uses the Application object's Quit method to close Microsoft Excel. If the application was already running, no attempt is made to close it. The reference itself is released by setting it to Nothing. 
 
' Declare necessary API routines: 
Declare Function FindWindow Lib "user32" Alias _ 
"FindWindowA" (ByVal lpClassName as String, _ 
ByVal lpWindowName As Long) As Long 
 
Declare Function SendMessage Lib "user32" Alias _ 
"SendMessageA" (ByVal hWnd as Long,ByVal wMsg as Long _ 
ByVal wParam as Long _ 
ByVal lParam As Long) As Long 
 
Sub GetExcel() 
Dim MyXL As Object ' Variable to hold reference 
' to Microsoft Excel. 
Dim ExcelWasNotRunning As Boolean ' Flag for final release. 
 
' Test to see if there is a copy of Microsoft Excel already running. 
On Error Resume Next ' Defer error trapping. 
' Getobject function called without the first argument returns a 
' reference to an instance of the application. If the application isn't 
' running, an error occurs. 
Set MyXL = Getobject(, "Excel.Application&quot

If Err.Number <> 0 Then ExcelWasNotRunning = True 
Err.Clear ' Clear Err object in case error occurred. 
 
' Check for Microsoft Excel. If Microsoft Excel is running, 
 
' enter it into the Running Object table. 
DetectExcel 
 
Set the object variable to reference the file you want to see. 
Set MyXL = Getobject("c:\vb4\MYTEST.XLS&quot

' Show Microsoft Excel through its Application property. Then 
' show the actual window containing the file using the Windows 
' collection of the MyXL object reference. 
MyXL.Application.Visible = True 
MyXL.Parent.Windows(1).Visible = True 
' Do manipulations of your 
' file here. 
 
' ... 
' If this copy of Microsoft Excel was not running when you 
' started, close it using the Application property's Quit method. 
' Note that when you try to quit Microsoft Excel, the 
' title bar blinks and a message is displayed asking if you 
' want to save any loaded files. 
If ExcelWasNotRunning = True Then 
MyXL.Application.Quit 
End IF 
 
Set MyXL = Nothing ' Release reference to the 
' application and spreadsheet. 
End Sub 
 
Sub DetectExcel() 
 
' Procedure dectects a running Excel and registers it. 
Const WM_USER = 1024 
Dim hWnd As Long 
' If Excel is running this API call returns its handle. 
hWnd = FindWindow("XLMAIN", 0) 
If hWnd = 0 Then ' 0 means Excel not running. 
Exit Sub 
Else 
' Excel is running so use the SendMessage API 
' function to enter it in the Running Object Table. 
SendMessage hWnd, WM_USER + 18, 0, 0 
End If 
End Sub

edderic · Feb 6, 2000

'Add a module to your project (In the menu choose Project -> Add Module, Then click Open) 
'Add 1 List Box and 1 Command Button to your form. 
'Insert this code to the module : 
 
Public Const TH32CS_SNAPPROCESS As Long = 2& 
Public Const MAX_PATH As Integer = 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 CreateToolhelpSnapshot Lib "Kernel32" Alias _ 
"CreateToolhelp32Snapshot" (ByVal lFlags 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) 
 
'Insert the following code to your form: 
 
Private Sub Command1_Click() 
Dim hSnapShot As Long 
Dim uProcess As PROCESSENTRY32 
Dim r As Long 
hSnapShot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&) 
If hSnapShot = 0 Then 
Exit Sub 
End If 
uProcess.dwSize = Len(uProcess) 
r = ProcessFirst(hSnapShot, uProcess) 
Do While r 
List1.AddItem uProcess.szExeFile 
r = ProcessNext(hSnapShot, uProcess) 
Loop 
Call CloseHandle(hSnapShot) 
End Sub 
 
Eric De Decker <a href=mailto:vbg.be@vbgroup.nl>vbg.be@vbgroup.nl</a> <a href=

http://members.tripod.lycos.nl/VisualBasicCenter/>Visual

Basic Center</a>

edderic · Feb 6, 2000

send me a meal an i send a example 
Eric De Decker <a href=mailto:vbg.be@vbgroup.nl>vbg.be@vbgroup.nl</a> <a href=

http://members.tripod.lycos.nl/VisualBasicCenter/>Visual

Basic Center</a>

Alt255 · Feb 6, 2000

Thanks for the samples, guys. I think I can integrate the logic in my project.

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Unauthorized Applications 2

Alt255

Programmer

DougP

MIS

edderic

Programmer

edderic

Programmer

Alt255

Programmer

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