Solved

monitoring my application if is open or not.

Posted on 2006-07-04
8
196 Views
Last Modified: 2010-04-05
so, I'm trying to build a application to my cybercafe, so I have a client application in my clients computer, but sometimes happening that, somebody try to close this client application to denny my server to monitoring this machine.

what I want to do is create other application that monitoring this client application if is open or not, if is not then open it.
by the way, this application have to be hide from taskbar.

this way, my clients is not going to be abble to denny my application to close the pc when him time is done. So they have to pay for more time.
0
Comment
Question by:rafaelrgl
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
8 Comments
 
LVL 17

Expert Comment

by:TheRealLoki
ID: 17038958
what about making your monitoring application a service instead?
it's less obvious, and unless the logged on user has the rights, they cannot close it
at the very least, you could make your "check if my app is running" a simple service, thatruns your app if it is not running.
(much like the Firebird Guardian Service and Interbase Guardian services do)
all you would need to do for example is :-
if FindWindow('TfWMonitorApplication', 'Cyer monitor') = nil then
  winexec('c:\myapp.exe'); // runi t because it is not running

1 other method would be to not let your application close
e.g you need a password to close it

in the Form's "OnCloseQuery" event you could add
CanClose := (inputbox('Close', 'Password', '') = 'secret');

you would then just need to catch the wm_queryendsession message so that windows could close your app if it needed to shut down.
but if you manually close the machines down you can just enter the password
0
 
LVL 1

Author Comment

by:rafaelrgl
ID: 17039028
if FindWindow('TfWMonitorApplication', 'TEST') = nil then
begin
   showmessage('program is not running');
end;

I try to do like this above and show this error:   Operator not applicable to this operand type
0
 
LVL 17

Expert Comment

by:TheRealLoki
ID: 17039125
sorry
if FindWindow('TfWMonitorApplication', 'TEST') = 0 then
...
it returns a handle
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 1

Author Comment

by:rafaelrgl
ID: 17039405
well, my application on trayicon and hide. When I try to test the function if my application is open or not, the function shows the message, something is wrong.

if FindWindow('TfWMonitorApplication', 'TEST') = 0 then
begin
   showmessage('is running');
end;
0
 
LVL 17

Assisted Solution

by:TheRealLoki
TheRealLoki earned 200 total points
ID: 17039629
ahh ok, because it is hidden you will need to look for it another way

try this

function IsProcessRunning(ExeFileName: string): boolean;
    const
        PROCESS_TERMINATE=$0001;
    var
        ContinueLoop: BOOL;
        FSnapshotHandle: THandle;
        FProcessEntry32: TProcessEntry32;
    begin
        result := False;
        FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
        FProcessEntry32.dwSize := Sizeof(FProcessEntry32);
        ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);
        while (not Result) and (integer(ContinueLoop) <> 0) do
        begin
            if (StrIComp(PChar(ExtractFileName(FProcessEntry32.szExeFile)), PChar(ExeFileName)) = 0)
              or (StrIComp(FProcessEntry32.szExeFile, PChar(ExeFileName)) = 0)  then
                Result := True;
            ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
        end;
        CloseHandle(FSnapshotHandle);
    end;

procedure TForm1.Button1Click(Sender: TObject);
    begin
        if IsProcessRunning('Notepad.exe') then ShowMessage('yes'); // replace notepad.exe with the path and filename of your tray application
    end;
0
 
LVL 1

Author Comment

by:rafaelrgl
ID: 17039893
Build
  [Error] FrmMonitor.pas(34): Undeclared identifier: 'TProcessEntry32'
  [Error] FrmMonitor.pas(37): Undeclared identifier: 'CreateToolhelp32Snapshot'
  [Error] FrmMonitor.pas(37): Undeclared identifier: 'TH32CS_SNAPPROCESS'
  [Error] FrmMonitor.pas(38): Missing operator or semicolon
  [Error] FrmMonitor.pas(39): Undeclared identifier: 'Process32First'
  [Error] FrmMonitor.pas(42): ')' expected but identifier 'szExeFile' found
  [Error] FrmMonitor.pas(60): Record, object or class type required
  [Error] FrmMonitor.pas(62): 'END' expected but end of file found
 
0
 
LVL 16

Accepted Solution

by:
CodedK earned 300 total points
ID: 17039899
Hi... TheRealLoki  why "TfWMonitorApplication" ? (This is the handle for Mozzilla ?)

FindWindow(class name : string, window name : string)

So because you dont have the handle just do this:

if  FindWindow(nil, 'The caption of your application')=0 then
run it.... (with ShellExecute or winexec)


0
 
LVL 12

Expert Comment

by:AmigoJack
ID: 17040569
you could use code injection to prevent any application from being closed. but thats rather a bomb and should be handled very carefully. do you compile your "watching software" yourself or is it a third party one?

another way to solve the problem is the question "HOW do the users kill your program"? you can disable taskmanagers, only few people know the commandline...
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…
Suggested Courses
Course of the Month9 days, 18 hours left to enroll

624 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question