Re: Modeless Dialog box using win32 API only - C / C++ / MFC Discussion Boards

BITMAPINFOHEADER working in Debug but not in Release

002comp19-Aug-12 21:15

19-Aug-12 21:15

Hello Friends

creating a mFC project. Saving a image in bmp,for that I am using BITMAPINFOHEADER.
In Debug build,its working fine. But in release Build, BITMAPINFOHEADER fields are not accepting values that I am putting,it is still showing some garbage value.

Do I need to change in properties for release build ?

Thanks In Advance.
Regards
Yogesh

Re: BITMAPINFOHEADER working in Debug but not in Release

Endurion_19-Aug-12 22:39

Endurion_

19-Aug-12 22:39

How do you check the values in Release? I hope not via debugger?

Re: BITMAPINFOHEADER working in Debug but not in Release

002comp19-Aug-12 22:43

002comp

19-Aug-12 22:43

Hi we cn debug in release build too.

Re: BITMAPINFOHEADER working in Debug but not in Release

Endurion_20-Aug-12 5:01

Endurion_

20-Aug-12 5:01

Release builds usually optimize and this makes the debugger go wrong often.
If you want to see the values in Release it's probably better to use other means, writing them to a file or other external resource/tool.

Re: BITMAPINFOHEADER working in Debug but not in Release [Solved] but need one Suggestion

002comp19-Aug-12 22:41

002comp

19-Aug-12 22:41

Hey Guys

I found on net that whenever you found something working on debug but not in release build then first of all Disable optimization under Project properties ->c/c++ Tab,Under Optimization category - >under option (optimization).

I choose to Disable from maximize speed in release build then its working.

But,I have doubt over this. What it should be the optimization in release build and If it is other than Disable option then how this problem can be solved.
Any Views ??

But,Anyway mine BitmapInfoheader problem is Solved.

Regards
Yogesh

Re: BITMAPINFOHEADER working in Debug but not in Release

CPallini19-Aug-12 23:00

CPallini

19-Aug-12 23:00

Probably you missed some initialization, see this excellent article about: "Surviving the Release Version"[^].

Veni, vidi, vici.

Modeless Dialog box using win32 API only

csrss19-Aug-12 7:14

csrss

19-Aug-12 7:14

Is there any way of doing it? I am trying to write some simple class for showing modeless dialog box and just cannot understand what is wrong with it. While it is pretty easy with DialogBoxParam - there seems to be no way with CreateDialog. My goal is to pass somehow a pointer to a class to call my dlgProc. The way i am doing it with modal dlgbox:

INT_PTR DoModal(UINT nResourceId)
{
	::InitCommonControls();
	return ::DialogBoxParam(::GetModuleHandle(NULL), 
                                 MAKEINTRESOURCE(nResourceId), 
                                 NULL, DlgProcModal, reinterpret_cast<LPARAM>(this));
}

static INT_PTR __stdcall DlgProcModal(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    ....
if( uMsg == WM_INITDIALOG )
{
	if( !pWnd )
	{
		pWnd = reinterpret_cast<CBaseDlgWindow *>(lParam);
		::SetWindowLongPtr(hwndDlg, GWLP_USERDATA, (LONG_PTR)pWnd);
		pWnd->m_hWnd = hwndDlg;
	}
}
}

The way i am trying to do it with modeless and it is just not working:

INT_PTR DoModeless(UINT nResourceId)
{
	::InitCommonControls();
	if( m_hWnd = ::CreateDialog(::GetModuleHandle(NULL), MAKEINTRESOURCE(nResourceId), NULL, DlgProcModeless) )
	{
		m_bModeless = true;
		::SetWindowLongPtr(m_hWnd, GWLP_USERDATA, (LONG_PTR)this);
			
		MSG msg = { 0x00 };
		while (::GetMessage(&msg, m_hWnd, 0, 0)) 
		{ 
			if (!::IsDialogMessage(m_hWnd, &msg))
			{ 
				::TranslateMessage(&msg); 
				::DispatchMessage(&msg); 
			}
		}
	}
	::DestroyWindow(m_hWnd);
	return 0;
}

static INT_PTR __stdcall DlgProcModeless(
		HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam
		)
{
	LONG_PTR lResult = ::GetWindowLongPtr(hwndDlg, GWLP_USERDATA);
	CBaseDlgWindow * pWnd = reinterpret_cast<CBaseDlgWindow *>(lResult);
...
}

What am i doing wrong?
Thanks in advance.

011011010110000101100011011010000110100101101110
0110010101110011

Re: Modeless Dialog box using win32 API only

pasztorpisti19-Aug-12 12:49

pasztorpisti

19-Aug-12 12:49

First, you probably have a main message loop somewhere that dispatches messages to every window (and dialog), not only to a specified window:

C++

// global variable, it contains the handle of all dialogs
std::vector<HWND> g_Dialogs;

// your main loop somewhere near your main()
MSG msg;
while (::GetMessage(&msg, NULL, 0, 0)) 
{
    // copying the global array because it might be modified during iteration
    // and we iterate over the copy...
    std::vector<HWND> dialogs(g_Dialogs);
    bool was_dialog_message = false;
    for (size_t i=0,e=dialogs.size(); i<e; ++i)
    {
        if (::IsWindow(dialogs[i]) && ::IsDialogMessage(dialogs[i], &msg))
        {
            was_dialog_message = true;
            break;
        }
    }
    if (!was_dialog_message)
    { 
        ::TranslateMessage(&msg); 
        ::DispatchMessage(&msg); 
    }
}

When you want a modeless dialog, you just create it with CreateDialog(), put its handle to g_Dialogs and thats it. You don't have to run a local message loop like with modal messageboxes, especially not with a specified single window handle (m_hWnd). A modeless dialog works almost like a normal window that you created with CreateWindowEx(), you just have to handle it a bit specially with IsDialogMessage(). In a modeless multi-windowed gui program its always enough one message loop - the main message loop pumps the messages for all modeless windows.

EDIT: warning: while you are iterating over the g_Dialogs vector, the contents of the vector might change because you dispatch messages to dialogs that can respond to those messages by creating/deleting dialogs! To avoid bugs caused by this you either use a custom container that can be modified during iteration or solve it somehow else. One good solution can be copying the vector before iteration and iterating on the copied vector, still some HWNDs might become invalid during iteration so before IsDialogMessage() it might be wise to call IsWindow() on the handles.

modified 19-Aug-12 19:12pm.

Re: Modeless Dialog box using win32 API only

csrss19-Aug-12 21:03

csrss

19-Aug-12 21:03

Hey, thanks for your reply. My problem was that i couldn't find a way to put the whole thing into nice C++ class of my own. But, problem was solved by using CreateDialogParam instead. So i can pass a pointer to the dialog class to a main message loop so i can call my own virtual methods inside children classes.
Cheers.

011011010110000101100011011010000110100101101110
0110010101110011

Re: Modeless Dialog box using win32 API only

pasztorpisti20-Aug-12 1:49

pasztorpisti

20-Aug-12 1:49

I though that your problem is the messagebox because your loop was inside the DoModeless() method. Anyway, your previous hooking is also fine, you just miss a few messages that come before the return of your CreateDialog() call and you have to handle uninitialized GWLP_USERDATA cases as well. Even if you initialize userdata from WM_INITDIALOG it might be better to handle uninitialized cases, who knows what the future brings? Smile | :)

just want to find a friend

cnmqy19-Aug-12 0:56

cnmqy

19-Aug-12 0:56

I'm a Chinese , want to find a friend who use C/C++
,and i want to comunicate with him ,anything
my email and MSN is mqy_bs@Hotmail.com,E-mail me if you want

Re: just want to find a friend

Richard MacCutchan19-Aug-12 2:37

Richard MacCutchan

19-Aug-12 2:37

You should really read this set of guidelines[^] for using these forums. If you have trouble with English then the General Chinese Forum[^] has members who can help you.

One of these days I'm going to think of a really clever signature.

How to distinguish the broad packets or normal packets?

wangningyu17-Aug-12 17:19

wangningyu

17-Aug-12 17:19

The following is a fragment of code：

C++

sockaddr_in     from,a;
WSADATA         wsdata;
BOOL            optval = TRUE;
u_short         uPort  = m_nPort;

if(WSAStartup(0x0202,&wsdata) != 0)
{
    CString strErr;
    strErr.Format(_T("WSAStartup Init failed! Error code:%d"),WSAGetLastError());
    AddNote(strErr);
    _endthreadex(0);
    return FALSE;
}

a.sin_family        = AF_INET;
a.sin_addr.s_addr   = 0;
a.sin_port          = htons(uPort);

from.sin_family         = AF_INET;
from.sin_addr.s_addr    = INADDR_BROADCAST;
from.sin_port           = htons(uPort);

int fromlength=sizeof(SOCKADDR);
pThread->m_socket = socket(AF_INET,SOCK_DGRAM,0);
setsockopt(pThread->m_socket,SOL_SOCKET,SO_BROADCAST,(char FAR *)&optval,sizeof(optval));
bind(pThread->m_socket,(sockaddr *)&a,sizeof(sockaddr_in));

char        buf[BUF_MAX_LEN] = {0x00};
int         nLen = 0;
char        *pszIPClient = NULL;
u_short     uPortClient  = 0;
THREADBOARD *pThreadBoard = NULL;
CString     strInit = _T("");

strInit.Format(_T("Port: %d Now waiting for clients..."),uPort);
AddNote(strInit);

while(true)
{
    nLen = recvfrom(pThread->m_socket,buf,BUF_MAX_LEN,0,(struct sockaddr FAR *)&from,(int FAR *)&fromlength);
    if(nLen > 0)
    {
        // How to distinguish is send broadcast , or normal send ?
    }
}

Thanks for your reply !

Re: How to distinguish the broad packets or normal packets?

pasztorpisti18-Aug-12 0:33

pasztorpisti

18-Aug-12 0:33

You can do this by using raw sockets but I was raw-socketing only on linux, dont know how it works on windows (if it works at all...). I searched for an example and found this discussion: http://bytes.com/topic/c/answers/900770-how-determine-origin-incoming-message-uincast-multicast-broadcast[^]
One of the answers contains source code, read along that thread. Note: I havent tested their code.

EDIT: The trick is simple: the sendto address is in the header of the datagram you received, but your recvfrom returns just the payload from that and the address of the sender. You need a method to reach other fields of the received UDP packet header, one way is using raw sockets.

modified 18-Aug-12 11:22am.

Re: How to distinguish the broad packets or normal packets?

Software_Developer18-Aug-12 3:56

Software_Developer

18-Aug-12 3:56

First [this].

Then, Packet Filtering , found [here].

Also [this].

Re: How to distinguish the broad packets or normal packets?

wangningyu22-Aug-12 21:11

wangningyu

22-Aug-12 21:11

Thanks !

Can AdjustTokenPrivileges elevate the privilege as Administrator?

Falconapollo17-Aug-12 5:39

Falconapollo

17-Aug-12 5:39

Programs under windows need administrator privilege must get user's permission when they start. And they can also run with administrator privilege by right click the EXE and select "Run as Administrator". But, before the EXE start, a message box will show up. It's really disgusting.

Now I want my application to run as the Administrator, and I don't want the popup message box when user click the EXE file.

Now I wonder whether AdjustTokenPrivileges can help me achieve this.

Any one can help me?

modified 18-Aug-12 10:13am.

Re: What's worong with Google Code?

Richard MacCutchan17-Aug-12 6:55

Richard MacCutchan

17-Aug-12 6:55

This has nothing to do with C++/MFC, please choose a forum more appropriate to the subject. You may find that the most appropriate forum is Google itself.

One of these days I'm going to think of a really clever signature.

Re: Can AdjustTokenPrivileges elevate the privilege as Administrator?

Richard Andrew x6418-Aug-12 6:27

Richard Andrew x64

18-Aug-12 6:27

So you want your program to run as an admin without notifying the user, or getting the admin's permission?

Sounds like malware to me.

The difficult we do right away...
...the impossible takes slightly longer.

C Functions and Macros

roza12317-Aug-12 1:48

roza123

17-Aug-12 1:48

1. This program displays a running counter starting from 0 till infinity. The counter starts/resets by pressing enter and stops by pressing some other key. Use as many define directives and macros to achieve this task. The counter when played should be like a real counter (no separate line should be used for the
next counter increment). Hint: use clrscr() command inside the for loop.

Re: C Functions and Macros

Richard MacCutchan17-Aug-12 1:55

Richard MacCutchan

17-Aug-12 1:55

Please try and do your own homework. If you get stuck on a particular part of the code then post a question here, but do not expect others to provide an entire solution without any effort on your part.

One of these days I'm going to think of a really clever signature.

Re: C Functions and Macros

roza12317-Aug-12 2:03

roza123

17-Aug-12 2:03

It was not homework.I saw that question in book and Dont know how to solve it.So i thought to ask The Experts to help me.

Re: C Functions and Macros

Richard MacCutchan17-Aug-12 2:22

Richard MacCutchan

17-Aug-12 2:22

Experts will help you, but you are expected to make some effort for yourself first.

One of these days I'm going to think of a really clever signature.

Re: C Functions and Macros

Malli_S17-Aug-12 2:41

Malli_S

17-Aug-12 2:41

Try not to re-post the question. Have patience to get answers.

[Delegates] [Virtual Desktop] [Tray Me !]

-Malli...!

Re: C Functions and Macros

David Crow17-Aug-12 2:43

David Crow

17-Aug-12 2:43

Why is there a "1." preceding the text? Were you going to ask a second question? What's with the "Hint:" at the end? Confused | :confused:

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