Re: Running program more than 1 time - C / C++ / MFC Discussion Boards

maybe the virus messed up the 'modified date' attribute of the files ..

Do any of the files still have a future date? This happened to me just yesterday. Someone from another TZ ahead of mine sent me some files. Some of the files were dated several hours ahead of my current time. Everytime I went to run the program, I was asked if I wanted to rebuild it. I finally went to the folder to find what file was dated in the future, opened it up, made a change, and re-saved the file. Problem solved.

I hope you backed up the your work space (.dsw and .dsp files at the very leasted).

If your company [or you} was realy worried obout the virus attack then some-one should have asked the administrator for a daily backup (of your projects files).

The statement "of his project file" sounds like you all are using different project files.

Check the date (and time) of all your files.

Have every one involded with the project recompile thier portion of the project. If the problem does not go away after that then you better (ask the administator to) scan the server.

Trust in the code Luke. Yea right!

Hi
I want to be able to check wheither the program is already running, so i don't want the program getting executed more then 1 time. The user should only get 'the second or more times he tries' a messagebox or some information that the program is already running on the system and has to be shutdown first to be ran.

Greetings
Jens

Try this[^]

~RaGE();

yeah seems like that class was exactly what i was looking for.
Thanks Rage! Smile | :)

And btw, do you happen to know a class which can return the current CPU id. I need that id to implement some security. (don't like this method of working though )

Greetings
Jens

JensB wrote:
yeah seems like that class was exactly what i was looking for.

If you need it, try and download it from PJ's website directly, I think the version is updated.

JensB wrote:
And btw, do you happen to know a class which can return the current CPU id. I need that id to implement some security. (don't like this method of working though

Maybe you could use GetSystemInformation.

Quoted from MSDN :

The GetSystemInfo function returns information about the current system. 

VOID GetSystemInfo(
  LPSYSTEM_INFO lpSystemInfo   // address of system information 
                               // structure
);
 
typedef struct _SYSTEM_INFO { // sinf 
    union { 
        DWORD  dwOemId; 
        struct { 
            WORD wProcessorArchitecture; 
            WORD wReserved; 
        }; 
    }; 
    DWORD  dwPageSize; 
    LPVOID lpMinimumApplicationAddress; 
    LPVOID lpMaximumApplicationAddress; 
    DWORD  dwActiveProcessorMask; 
    DWORD  dwNumberOfProcessors; 
    DWORD  dwProcessorType; 
    DWORD  dwAllocationGranularity; 
    WORD  wProcessorLevel; 
    WORD  wProcessorRevision; 
} SYSTEM_INFO;

Check it out directly in the MSDN for more info about the struct members.

Hope this helps.

~RaGE();

ok i will check it out directly @ msdn Smile | :)

I've downloaded the latest CSingleInstance v1.12 and implemented it on a new mdi application and it worked great.
BUT
When i try to implement it to my existing application, it doesn't work
i'll paste the appnameApp::InitInstance here:

CFile f;
SetRegistryKey("Company");
SetDialogBkColor(); // set dialog background color to gray
LoadStdProfileSettings(); // Load standard INI file options (including MRU)

AddDocTemplate(new CSingleDocTemplate(IDR_MAINFRAME,
RUNTIME_CLASS(CMyAppNameDoc),
RUNTIME_CLASS(CMainFrame), // main SDI frame window
RUNTIME_CLASS(CMyAppNameView)));
int iNrOfDialog = 1;
BOOL bGoOn=TRUE;
CDialog *pDialog;
int pushed;

m_bFromMain = false;

while (bGoOn)
{
switch (iNrOfDialog){
case 1:
{
pDialog = new CDlgWelcome2();
pDialog->DoModal();
delete pDialog;
pDialog = new CDlgWelcome();
pDialog->DoModal();
delete pDialog;
pDialog = new CDLogon();
pushed = pDialog->DoModal();
switch (pushed)
{
case (NEXT):
iNrOfDialog++;
break;
case (EXIT):
bGoOn = FALSE;
b_mExit = true;
break
}
delete pDialog;
break;
}
case 2:
{
pDialog = new CDlgList();
pushed = pDialog->DoModal();
....

so this code i don't have:
CMainFrame* pMainFrame = new CMainFrame;
m_pMainWnd = pMainFrame;

if (!pMainFrame->LoadFrame(IDR_MAINFRAME))
return FALSE;

I've pasted the following code:
CInstanceChecker instanceChecker;
if (instanceChecker.PreviousInstanceRunning())
{
AfxMessageBox(_T("Previous version detected, will now restore it"), MB_OK);
instanceChecker.ActivatePreviousInstance();
return FALSE;
}
That i have put totally in the beginning of InitInstance.
And then before i go into the while repeating:
instanceChecker.TrackFirstInstanceRunning();

When i execute the program (use vc5) it gives an error on the line when i call the 'trackfirstinstanceRunning()'.
debug assertion failed:
sinstance.cpp
line: 145

What is on line 145:
ASSERT(AfxGetMainWnd() != NULL); //Did you forget to set up the mainfrm in InitInstance ?

I don't yet have a mainfrm, but a welcome form + logon form.
When can i know when the mainfrm is setup?

Any ideas? Frown | :(

ah sorry

i have put the trackfirstinstancerunning() at the end of InitInstance and now it works great (because then you have a mainwindow)

Anyway, thanks for the article Smile | :)

Here is another solution.

Is anyone who knows how to obtain a path to the folder in which there are dial up entries defined.

Please help

Why do you need a path to the folder? Can't you just use the Rasxxx() functions directly?

Here is an example of enumerating the RAS entries:

lpRasEntryName         = (LPRASENTRYNAME)GlobalAlloc(GPTR, sizeof(RASENTRYNAME));
lpRasEntryName->dwSize = sizeof(RASENTRYNAME);
nRet = RasEnumEntries(NULL, NULL, lpRasEntryName, &cb, &cEntries);
if (ERROR_BUFFER_TOO_SMALL == nRet)
{
    lpRasEntryName         = (LPRASENTRYNAME)GlobalAlloc(GPTR, cb);
    lpRasEntryName->dwSize = sizeof(RASENTRYNAME);
}
 
// Calling RasEnumEntries to enumerate the phone-book entries    
nRet = RasEnumEntries(NULL, NULL, lpRasEntryName, &cb, &cEntries);
 
if (nRet != ERROR_SUCCESS)
{
    TRACE("RasEnumEntries failed: Error %d\n", nRet);
}
else
{
    TRACE("Phone-book entries in the default phone book:\n\n");
    
    for(i = 0; i < cEntries; i++)
    {
        TRACE("%s\n", lpRasEntryName->szEntryName);
        lpRasEntryName++;
    }
}

LPITEMIDLIST pidlDialUp;
LPSHELLFOLDER pDesktop,
pDialUp;
LPITEMIDLIST pidlTarget,
pidlTemp,
pidlDialUp;
LPENUMIDLIST pEnum;
DWORD dwRetrieved;
char szTemp[MAX_PATH];
HRESULT hr;

if(FAILED(SHGetDesktopFolder(&pDesktop)))
return NULL;

pidlDialUp = GetDialUpNetworkingPidl(pDesktop);

a piece of GetDialUpNetworkingPidl...

if(!pDesktop)
return NULL;

//get the pidl for Dial-Up Networking
hr = pDesktop->ParseDisplayName( NULL,
NULL,
L"::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{992CFFA0-F557-101A-88EC-00DD010CCC48}",
NULL,
&pidlDialUp,
NULL);

This is the ParseDisplayName from windows 98, and I have no clue how the name for dialupnetowking directory look under windows 2000

I need it for creating a shortcut on the desktop programmataticly.

Jump_Around wrote:
I need it for creating a shortcut on the desktop programmataticly.

Use the IShellLink interface. Here are some examples:

http://www.codeproject.com/managedcpp/mcppshortcuts.asp?target=ishelllink[^]

http://www.codeproject.com/shell/desktopshortcut.asp?target=ishelllink[^]

I have one C++ dll with exported functions. But I dont have any details about the function's signatures.Is it possible to find out the same? Confused | :confused:

Vikram

No, not without the headers. if the exported functions end with @0 they take no parameters, @4 for 1 parameter, @8 for two parameters and so on. But I guess this won't help you much.

regards

modified 12-Sep-18 21:01pm.

Thanx for the reply Grag,
Is it possible, by going inside the PE File structure or some another way of reverse engg? OMG | :OMG:

Which is what Depends.exe does, but it still does not show you the function's signature.

Hi,

You can use the dependency walker to see the signatures.

Pankaj

Without struggle, there is no progress

Why do you want or need the export signatures?

Trust in the code Luke. Yea right!

In order to make use of them, you need to know the return type and the parameter list. Normally, a .H file would provide this, but if you don't have that, other methods must be employed.

:(Your correct, of cource. I should have realised there was no header file(s) available. I do remember a project, someone submitted some where (possibly here), that took a .DLL and generated the needed files .h and .lib.

Trust in the code Luke. Yea right!

Hi,

I think I have hit the final roadblock in my bid to learn how to be comfortable with DLLs. I spend the whole of last night trying to figure this out, but to no avail.

I wanted to create a custom window control which all it does is draws a rectangle and blits a bitmap in it. I did it without a DLL and it worked without a hitch. Now, I used the same code and tried to write a DLL interface to it as follows:

//----------------------------------------------------------------------------------long _stdcall InitControl(HINSTANCE instance, HWND hwnd, HBITMAP hBitmap, int x, int y, int width, int height)
{
View::RegisterClass(instance);
//Offset::RegisterClass(instance);
background = new Bitmap(hBitmap);
pCtrl = new Controller(hwnd, background);
SetWinLong<controller *=""> (hwnd, pCtrl);
return 0;
}

//----------------------------------------------------------------------------------
The View::RegisterClass(instance) line is supposed to register my window control class. Using the debugger, I see that the RegisterClassEx(WNDCLASSEX) returns a non-zero value basically indicating success.

Now, in my controller class I try to create the window as:
View::MakeWindow (HWND, hwndParent, childID);

How the CreateWindowEx(...) returns zero. I verified all the parameters and they are not null. I even verified the parent handle (coming from the VB call) through Spy++ and it is indeed the same window with the right HINSTANCE. The error code string is "Cannot find window class". So, I am guessing the window did not get registered.

However, this same code works in a normal program. So, are there some rules when I am registering my own windows in a DLL. Do the parent window and the child window have to share the same DLL or something like that? I cannot understand what I am doing wrong.

Also, the VB declaration is like this:

Public Declare Function InitControl Lib "C:\BOXDLL.dll" (ByVal instance As Long, ByVal hwnd As Long, ByVal back As Long, ByVal x As Integer, ByVal y As Integer, ByVal width As Integer, ByVal height As Integer) As Long

and the call is:

InitControl App.hInstance, Me.hwnd, Me.Picture.Handle, 10, 10, 900, 200

I would really appreciate some help here. I have inching towards learning this for a whole month now and I am so close. However, this is the toughest problem I have encountered so far.

Also, I am not using MFC.

If you live around Stuttgart and help me, I will do your laundry for a week Frown | :(

Thanks,
Pankaj

Without struggle, there is no progress

Are you creating an ActiveX control or what?
Need more input.

Trust in the code Luke. Yea right!

Nope, no ActiveX. However, I fixed it. So, it is all ok now Smile | :)

Pankaj

Without struggle, there is no progress