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Launch .exe file on Winlogon desktop

Posted on 2006-10-22
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Last Modified: 2008-02-07
Hello,
I'm working on this code to launch an executeable file called uptime.exe using the Winlogin Notification Package.

I'm using Visual Studio 6 C++ and the code below is still a work in progress. The file called uptime.exe is getting executed fine but does not appear on the winlogon desktop as I expected. The file works fine when logged on as an administrator just fine. I tried launching other .exe files too. One was a form created in Visual Basic .NET 2003 and the other was cmd.exe. None of those will appear on the Winlogon desktop either.

Any ideas on what steps I need to take to get this to work?
Thanks
 

#include <windows.h>
#include <Winwlx.h>
#include <stdio.h>
#include <winbase.h>

// Copyright (c) Microsoft Corporation. All rights reserved.

// Here is the entrance function for the DLL.
BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
    switch (dwReason)
    {
        case DLL_PROCESS_ATTACH:
            {

             // Disable DLL_THREAD_ATTACH & DLL_THREAD_DETACH
             // notification calls. This is a performance optimization
             // for multithreaded applications that do not need
             // thread-level notifications of attachment or detachment.

            DisableThreadLibraryCalls (hInstance);
            }
            break;
    }

    return TRUE;
}

// Here is the event handler for the Winlogon Start event.
extern "C"
__declspec(dllexport)
VOID WLEventStart (PWLX_NOTIFICATION_INFO pInfo)
{

    // Print the name of the handler to debug output.
    // You can replace this with more useful functionality.
   // TODO: Doesn't work right.TerminateProcess(pi.hProcess,0);   // Terminate Process uptime.exe
}

// Here is the event handler for the Winlogon Stop event.
extern "C"
__declspec(dllexport)VOID WLEventStop (PWLX_NOTIFICATION_INFO pInfo)
{

    // Print the name of the handler to debug output.
    // You can replace this with more useful functionality.
    PROCESS_INFORMATION pi;
 STARTUPINFO si;
 memset(&si, 0, sizeof(STARTUPINFO));
 si.cb = sizeof(STARTUPINFO);
 si.dwFlags = STARTF_USESHOWWINDOW;
 si.wShowWindow = SW_SHOW;
   
 CreateProcess(0,"C:\\Windows\\System32\\uptime.exe",0,0,0,0,0,0,&si,&pi); // Launch Process using CreateProcess
}
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Question by:hpops
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2 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 1600 total points
ID: 17784210
The problem here is that WINLOGON is a secured desktop and you need to alter the access rights to display a window. See NickRepin's example at http://skyscraper.fortunecity.com/gigo/311/winprog.html#cmdwinlogon on how that can be done.
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Author Comment

by:hpops
ID: 17786261
Thanks very much jkr. I think this is going to point me in the right direction.
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