Re: Splitters in MDI without WTL??? - C / C++ / MFC Discussion Boards

Help to create an application which will be executed in background

lillah25-Oct-04 6:39

25-Oct-04 6:39

Please, I'm newbie and i want to do a program without windows and dialogs, only executes in background and has an icon in system tray.

Thanks!

Re: Help to create an application which will be executed in background

David Crow25-Oct-04 7:28

David Crow

25-Oct-04 7:28

lillah wrote:
...i want to do a program without windows and dialogs...

Are you referring to a service?

lillah wrote:
...only executes in background...

"Running in background" is not a term used in Windows as it is a multitasking environment.

lillah wrote:
and has an icon in system tray.

Have you researched Shell_NotifyIcon()?

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: Help to create an application which will be executed in background

dharani26-Oct-04 21:47

dharani

26-Oct-04 21:47

You can do it .
Go to VC++-->New -->Projects-->Win32 Application -->Give project name-->Choose Simple Win32 Application . There you go ..
You can see an application with WinMain() ..No windows nothing as long as you dont want it ...
It willbe part of TaskManager but for making it have a icon in tray you have to refer some docs

Dharani Babu S

Re: Help to create an application which will be executed in background

lillah26-Oct-04 22:20

lillah

26-Oct-04 22:20

Thanks both.
I think i'm achieving it Smile | :)

Re: Help to create an application which will be executed in background

David Crow27-Oct-04 3:21

David Crow

27-Oct-04 3:21

I think you are confused. Creating a text-based application, as opposed to a GUI-based application, has nothing to do with running in the background. The term "background application" is a holdover from Unix. Windows, unlike DOS, is a multitasking environment. With DOS, you could create TSRs. With Windows, that is not necessary.

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remove IE features in CDHtmlDialog

pluto6625-Oct-04 5:58

pluto66

25-Oct-04 5:58

cdhtmldialog is a powerful class which extends a common mfc dialog. but there are some problems which i don't know how to solve:

- how to disable backspace (VK_BACK), that the user can't go back in history but still enable it if user edits a text in a textarea or textfield ()? is there a way to determine in which context the backspace is used?

- how to disable 'shift'+leftmouseclick on a link which results in opening a new (fully ie featured) window?

- and the last point: how to catch a click event on a button with a specific id, which is part of a page where i don't know the url in advance (i only know the id of the button)? cdhtmldialog starts with a html page that is part of the resources and user can proceed to several online pages on which he can finish/close a process by clicking on a button with a specific id!

Splitters in MDI without WTL???

Vircowskiy Yacow25-Oct-04 5:45

Vircowskiy Yacow

25-Oct-04 5:45

Hello, all!
Tell me please, how I can create a splitter in main window in MFC MDI? (Visual C++ 6.0, without WTL)

Re: Splitters in MDI without WTL???

KaЯl26-Oct-04 3:38

KaЯl

26-Oct-04 3:38

i'm not sure to totally understand your question, but you can create a splitter in the Child Frame window by using a CSplitterWnd in it.
Add a CSplitterWnd attribute to your child frame, then overload the virtual method virtual BOOL CFrameWnd::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext); to create the splitter window object:

For example:

BOOL CSplitterFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) 
{
	// create a splitter with 1 row, 2 columns
	if (!m_wndSplitter.CreateStatic(this, 2, 1))
	{
		TRACE0("Failed to CreateStaticSplitter\n");
		return FALSE;
	}

	if (!m_wndSplitter.CreateView(0,0,
		pContext->m_pNewViewClass, CSize(50, 50), pContext))
	{
		TRACE0("Failed to create first pane\n");
		return FALSE;
	}
	if (!m_wndSplitter.CreateView(1,0,
		pContext->m_pNewViewClass, CSize(50, 50), pContext))
	{
		TRACE0("Failed to create second pane\n");
		return FALSE;
	}

	// activate the input view
	SetActiveView((CView*)m_wndSplitter.GetPane(0,0));

	return TRUE;
}

Have a look to http://freedom2.pcupdate.easyspace.com/nt/ch07/182-186.html[^] for more info.

HTH,

K.

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"A leader is a man who can adapt principles to circumstances - Georges S. Patton, 1885–1945"

OnFileNew

0v3rloader25-Oct-04 5:30

0v3rloader

25-Oct-04 5:30

Hello,

Whenever the application's InitInstance is executed, what is the best way of preventing the OnFileNew method from being called without removing the command line parser? Is this possible to do without recurring to the use of flag variables?

Re: OnFileNew

BlackDice25-Oct-04 5:55

BlackDice

25-Oct-04 5:55

isn't OnFileNew() a function of the CView or its derived class? I'm not sure, but can't you just override in your derived class and not call the base class's function?

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Re: OnFileNew

Maximilien25-Oct-04 6:32

Maximilien

25-Oct-04 6:32

you could use CCommandLineInfo::FileNothing as a parameter to ParseCommandLine

Maximilien Lincourt
Your Head A Splode - Strong Bad

Multiple thread question

Tom Wright25-Oct-04 5:29

Tom Wright

25-Oct-04 5:29

If I have an "x" number of threads that I need started and will be passing messages to and from. Can I set my thread creating function like....

	<br />
//nThread = the number of threads I need to start<br />
<br />
CWinThread myThread[nThreads];<br />
<br />
for (int i = 0; i < nThreads; i++)<br />
{<br />
   myThread[i]= AfxBeginThread(MyThreadProc, this);<br />
}<br />
<br />

Thanks for the help.

Tom Wright
tawright915@yahoo.com

Re: Multiple thread question

Blake Miller25-Oct-04 5:44

Blake Miller

25-Oct-04 5:44

I just checked and AfxBeginThread returns a POINTER to a CWinThread.
You might want to do this instead:

//nThread = the number of threads I need to start

CWinThread* pMyThreads[nThreads]; // <-- note array of POINTERS now

for (int i = 0; i < nThreads; i++)
{
pMyThreads[i]= AfxBeginThread(MyThreadProc, this);
}

I think that will work.

How to fetch large binary object in bulks ?

Yariv25-Oct-04 4:54

Yariv

25-Oct-04 4:54

I need to be able to fetch bulk records on tables that contain binary columns such as images.
RFX_Binary_Bulk seems to be limited to INT_MAX and I didn't find something like RFX_LongBinary for bulk.
Any suggestions ?

Regards,
Yariv

Re: How to fetch large binary object in bulks ?

BlackDice25-Oct-04 5:18

BlackDice

25-Oct-04 5:18

I know with using ADO, you use GetChunk(). maybe you can find something equivalent for what you are doing.

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Keep child dialog visible while minimizing parent dialog

BlackDice25-Oct-04 4:24

BlackDice

25-Oct-04 4:24

Well, the title could be a little misleading. I have a CFormView as my main 'dialog'. I have a modeless dialog that I use for a chat window. When a user minimizes the main window, I want the chat window to still be visible. I've tried changint the style of the chat window to 'child','popup', and 'overlapped' and it still doesn't work. Likewise, I'd also like the chat window to show on the desktop without the main form if the main form is minized when new chat comes in. Right now the chat window isn't visible after receiving a message until the main window is restored. I've also tried using the hWnd of the desktop when creating the dialog, but that still doesn't help. Any suggestions are appreciated. Thanks!!

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Re: Keep child dialog visible while minimizing parent dialog

Blake Miller25-Oct-04 5:14

Blake Miller

25-Oct-04 5:14

The only other thing I thought to try really quick was to give it a NULL parent.
Failing that, you might not be ablke to make it a 'dialog' at all, and will have to make it a full-blown window - a regular window derived from CWnd doing its own processing. Then it should be relatively independent of the main window.

Re: Keep child dialog visible while minimizing parent dialog

BlackDice25-Oct-04 5:31

BlackDice

25-Oct-04 5:31

thanks! I already tried the NULL parent thing also, and that didn't seem to work. I changed the SetForeGround property to true, and that seems to make it work for when I receive a message, but it still minimizes with the main app, so I'm thinking of seeing if it' actually a window when I minimize, and if so, show it again, the way I regularly do.

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Re: Keep child dialog visible while minimizing parent dialog

Blake Miller25-Oct-04 5:41

Blake Miller

25-Oct-04 5:41

I think this is because MFC is traversing the window chain and 'windows' associated with the main user interface thread and just minimizing the whole lot of them when it is going down.
IF you were to place your modeless dialog into a separate user interface thread and parent it to the desktop it might not get minimized with the rest of the applications windows.
I have not tried this before, but that is the direction I would head next.

RESOLVED

BlackDice25-Oct-04 5:48

BlackDice

25-Oct-04 5:48

I fixed it in the CMainFrame class so that when my app is minimized, it makes a call to these three functions:

pView->m_pDlg->ShowWindow(SW_SHOW);		
pView->m_pDlg->SetForegroundWindow();
pView->m_pDlg->SetFocus();

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dangling pointers ?

Asim N.25-Oct-04 4:15

Asim N.

25-Oct-04 4:15

Three methods for dealing with dangling pointers are tombstones, lock-and-keys and garbage collection. What are the advantages and distadvantages of these ?

Regards,
Asim

Re: dangling pointers ?

David Crow25-Oct-04 4:53

David Crow

25-Oct-04 4:53

Wasn't this covered in class?

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: dangling pointers ?

Antony M Kancidrowski25-Oct-04 6:42

Antony M Kancidrowski

25-Oct-04 6:42

You would have to attend class to know though! Wink | ;)

Ant.

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I'm coloured, yet clear.
I'm fruity and sweet.
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Re: dangling pointers ?

Jim Crafton25-Oct-04 7:18

Jim Crafton

25-Oct-04 7:18

I don't know, but it sounds like an interesting article for you to write and post on CP if you ever find the answer! Smile | :)

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Re: dangling pointers ?

Ravi Bhavnani25-Oct-04 13:37

Ravi Bhavnani

25-Oct-04 13:37

You should really do your own homework, but I'll help you out just this once...

Tombstones
(adv) Not limited by the system's run length encoding limits.
(dis-adv) Can only be used once in an application.

Lock & keys
(adv) Easy to implement.
(dis-adv) Cannot be used in Unicode mode or when an app needs to divide by zero (eg: during complex mathematical computations).

Garbage collection
(adv) Can be used for procedures as well as functions.
(dis-adv) Not supported in languages like Java or C#.

/ravi

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