C / C++ / MFC

Sceptic Mole12-Nov-06 6:16

Sceptic Mole

12-Nov-06 6:16

Look for Windows Services[^].

Mike_V12-Nov-06 15:10

12-Nov-06 15:10

Only try Windows Services if you want your program to run under a different session so it continues to run even when the user logs off. If that is what you want, services are the only way to go.

Otherwise, what about ditching MFC and creating a raw Win32 Project as a GUI application, and just declaring your own WinMain function. If you aren't displaying any windows whatsoever, you probably don't need a message loop.

I'm sure there's a way to do it with MFC, so you could keep using CString, etc., but since I have never used MFC I don't know.

Mike

Johpoke13-Nov-06 8:17

Johpoke

13-Nov-06 8:17

I dont need it to run when logged off, just have no interface, and it doesnt have to be mfc either as im ok without it.

so from WinMain i clould make it seem like its creating a dialog, but it actualy doesnt, just runs without console or dialog in background?

sounds nice, how would i trick WinMain to have no dialogs?

/Johannes

Mike_V13-Nov-06 8:43

13-Nov-06 8:43

You don't have to do anything special; just treat it like a main() function from a console application. It won't create any dialogs unless you tell it to via CreateDialog, CreateWindow, or the MFC equivalent.

So a simple program: (no guarantees this actually works; it is untested)

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR, int)
{
    FILE *fp = fopen("C:\\test.txt", "wt");
    fprintf(fp, "Hello, world!\n");
    fclose(fp);

    // just for effect...
    MessageBox(GetActiveWindow(), "Done!", "GUI-less Program", MB_OK);
}

Johpoke13-Nov-06 8:51

Johpoke

13-Nov-06 8:51

How should i place that in MS visual c++ in a new win32 console project?

/Johannes

Johpoke13-Nov-06 8:52

Johpoke

13-Nov-06 8:52

How should i place that in MS visual c++ in a new win32 console project?

thanks for teh help

/Johannes

Mike_V13-Nov-06 12:20

13-Nov-06 12:20

Johpoke wrote:
How should i place that in MS visual c++ in a new win32 console project?

You need to create a Win32 GUI project.

Johpoke14-Nov-06 6:21

Johpoke

14-Nov-06 6:21

thanks a mil

/Johannes

how to generate key for using in AES algo

Johpoke14-Nov-06 9:09

Johpoke

14-Nov-06 9:09

In my program can i easily add mfc support?

/Johannes

sharad puttar12-Nov-06 0:22

sharad puttar

12-Nov-06 0:22

hi, this is my first live project. i am naive to VC++. i have to implement AES. As per my knowledge it uses symetric key + cipher for encryption and decryption.i have done a lot of study and getting confused a bit. please guide me how to generate that symetric key of 128 bit length. Is there any API or any self made method for generating this key and what should be my approach ??.Thankx so much in advance.it wud be so kind of u if u plz send me answer at my e-mail id.i have very critical dead lines.plz help.

Re: how to generate key for using in AES algo

Mark Salsbery12-Nov-06 8:02

Mark Salsbery

12-Nov-06 8:02

Using Cryptography[^]

Detecting mouse buttons

Waldermort11-Nov-06 23:55

Waldermort

11-Nov-06 23:55

Detecting mouse buttons itself is quite easy, but there an equaly easy way to detect if the mouse button is being held down for a period of time?

My method is to launch my own message loop, but if an error occurs it would kinda mess up the whole program. Please take a look at my code and if you see any potential probems, please point them out.

do
{
    if ( ! ::GetMessage( &msg, 0, 0, 0 ) )
        break;
    if ( ::CallMsgFilter( &msg, MSGF_SCROLLBAR ) )
        continue;
    pt = msg.pt;
    ::ScreenToClient(m_hWnd,&pt);
    if (msg.message == WM_LBUTTONUP)
        HandleMouseUp(pt);
    else if (msg.message == WM_MOUSEMOVE)
        HandleMouseMove(pt);
    else if (msg.message == WM_TIMER)
    {
        if ( bFirstRun )
        {
            // prevent a single click acting like a hold
            bFirstRun = false;
            // cause a 500ms pause before acting on mouse hold
            for ( int i=0; i<50; i++ )
            {
                ::Sleep(10);
                MSG peek;
                if ( PeekMessage(&peek,m_hWnd,WM_LBUTTONUP,WM_LBUTTONUP,FALSE) )
                    break;
            }
            continue;
        }
        HandleMouseDown(pt);
    }
    else
    {
        ::TranslateMessage( &msg );
        ::DispatchMessageW( &msg );
    }
} while ( msg.message != WM_LBUTTONUP );

Re: Detecting mouse buttons

Mike_V12-Nov-06 15:23

12-Nov-06 15:23

Every time I see the Sleep function in user-interface code I know there has to be a better way. You NEVER, except under most unusual circumstances, want to Sleep in a user-facing thread.

Kudos to you for using CallMsgFilter. Been reading Raymond Chen? Smile | :)

What I would suggest would be rewriting it: (pseudocode)

WM_LBUTTONDOWN:
    set a timer for 500ms

WM_LBUTTONUP:
    kill the timer

WM_TIMER:
    kill the timer
    post / send / call a OnMouseHold handler

Much simpler, no Sleep()s, and unless I missed something it should work.

Mike

Want help,please.

toeh11-Nov-06 23:04

toeh

11-Nov-06 23:04

Hello,

I'm a newbie in computer programming.
I'm looking for a program help me to change file attributes(Created time,Modified time and last access) like FileDate By T.YogaRamanan.

Here is link :

http://www.codeproject.com/file/FileDate.asp[^]

But I want to ignore its user interface.(No Dialog box , No Text box)

I want to choose file as coding and change file attribute as coding too.

I have tried to read source code of FileDate above.
I still can't do.

Can you help me ? Smile | :)

Thank you.

Hamid_RT11-Nov-06 23:13

Hamid_RT

11-Nov-06 23:13

Welcome

SetFileAttributes for attributes
SetFileTime for set date and time(your purpose)
SetFileShortNamefor set shor name

WhiteSky

toeh11-Nov-06 23:38

toeh

11-Nov-06 23:38

Any one can code it for me ?

Hamid_RT12-Nov-06 0:13

Hamid_RT

12-Nov-06 0:13

See http://www.codeproject.com/file/FileDate.asp[^]

WhiteSky

toeh12-Nov-06 0:19

toeh

12-Nov-06 0:19

Sure !
I want something like that.
But I want to choose file by coding, not Dialog box.
And set time by coding, not text box.

Can you modify it for me ?

Thank you.