C / C++ / MFC

11-Jun-12 22:13

You can encrypt any bit stream using the various libraries available for the purpose. To do what you are asking would require analysis of the stream and separation at each character of each word, which is impossible in spoken sounds.

Try saying "hello" with different stresses and see if you can determine the exact point where each letter starts and ends; do you hear one or two 'l's?

Control questions on Property pages

Re: Audio Encryption

Albert Holguin12-Jun-12 4:03

Albert Holguin

12-Jun-12 4:03

As long as the data is digitized (using PCM or some other encoding technique) it can be encrypted. Speech recognition is a completely different issue, and quite frankly I would advice you to not try to do that at this point (that's a pretty involved task). I would start with:
0. Learn how to turn voice into digital data using PCM (learn capture and playback techniques).
1. Learn how to use encryption (using a library is the fastest method).

modified 12-Jun-12 11:17am.

DeepT11-Jun-12 8:35

DeepT

11-Jun-12 8:35

I have a property page with at least 2 edit controls.

When the user presses enter on the first edit box, I want the 2nd edit box to become active and gain focus. I have tried:

void PropPageHello::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    // TODO: Add your message handler code here and/or call default

    CPropertyPage::OnKeyDown(nChar, nRepCnt, nFlags);
}

If you put a break pointin this function, it is never hit. I am not sure how to capture the enter key and set the focus of the next item.

modified 11-Jun-12 14:59pm.

Re: Control questions on Property pages

C^hris L^osinger11-Jun-12 8:58

C^hris L^osinger

11-Jun-12 8:58

instead of OnKeyDown, try PreTranslateMessage:

BOOL CMyDlg::PreTranslateMessage(MSG* pMsg) 
{
    if(pMsg->message==WM_KEYDOWN)
    {
        if(pMsg->wParam==VK_RETURN)
        {
            // got an enter
        }
    }	
    return CDialog::PreTranslateMessage(pMsg);
}

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Re: Control questions on Property pages

DeepT12-Jun-12 3:20

DeepT

12-Jun-12 3:20

Thanks, that worked.

Resource ID conflicts with internal MFC.

Maximilien11-Jun-12 7:06

Maximilien

11-Jun-12 7:06

Howdy'

(question at the end)
I'm looking into refactoring our code to be able to use all of the new MFC (VS2008) expansion UI goodies (custom toolbars, application framework, ...)

One of those goodies is the customize dialog (to be able to create new toolbars, move menu and toolbar buttons around).

From what I understand, the dialog uses resource ID in the 16000-17000(-ish) (afxribbonres.h )

Those ID come into conflict with some of our ID (mostly bad string in the new UI), no biggies, I will fix/renumber our ID.

Question:
Is there a proper way to handle those kind of issues ? a way to tell me at compilation time that I have resource ID conflicts when including external resource header file ?

Thanks.
Max.

Watched code never compiles.

Re: Resource ID conflicts with internal MFC.

Richard MacCutchan11-Jun-12 22:06

11-Jun-12 22:06

Maximilien wrote:
to be able to use all of the new MFC (VS2008) expansion UI goodies (custom toolbars, application framework, ...)

New?

I am not sure if the compiler can tell you about resource ID conflicts, but if you check this note[^] it gives some good guidance.

Re: Resource ID conflicts with internal MFC.

Maximilien13-Jun-12 5:02

Maximilien

13-Jun-12 5:02

Richard MacCutchan wrote:
New?

New as in "MFC Feature Pack 2008" Sniff | :^)

(4 years!)

The compiler does not report ID conflicts, it all builds nicely.

Anyway, I will clean up my hundreds of resources in the offending range.

Watched code never compiles.

CapAVI callback – again - user defined parameter?

Vaclav_11-Jun-12 4:20

Vaclav_

11-Jun-12 4:20

This is a callback function definition used in capAVI frame callback.
The LPVIDEOHDR structure supplies useful data and one of the members ( dwUser) can be user defined. Is there a way to set this before the system executes this callback?
Could someone point me to a sample code which actually uses this member in any capAVI callbacks.

LRESULT CALLBACK capVideoStreamCallback(
HWND hWnd,
LPVIDEOHDR lpVHdr
);
typedef struct videohdr_tag {
LPBYTE    lpData;
DWORD     dwBufferLength;
DWORD     dwBytesUsed;
DWORD     dwTimeCaptured;
DWORD_PTR dwUser;
DWORD     dwFlags;
DWORD_PTR dwReserved[4];
} VIDEOHDR, *PVIDEOHDR, *LPVIDEOHDR;
Thanks for your help.
Vaclav

Re: CapAVI callback – again - user defined parameter?

C^hris L^osinger11-Jun-12 4:46

C^hris L^osinger

11-Jun-12 4:46

does capSetUserData do it ?

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About Active Window And Receive Msg

yingkou11-Jun-12 3:53

yingkou

11-Jun-12 3:53

There is a MFC-Based Application，his window tree structure as below:
Root Parent Window
Sub-Parent Window1：Edit、ComboBox
Sub-Parent Window2：Edit、ComboBox、Static
Sub-Parent Window3：ListCtrl、Progress Bar
Sub-Parent Window4：Check Box
Child Window4-1：Edit、ComboBox
Child Window4-2：Edit、ComboBox
****
I want to know if user click any window(including controls) or Get Focus，which message can Root parent window receive.

Re: About Active Window And Receive Msg

Code-o-mat11-Jun-12 5:29

Code-o-mat

11-Jun-12 5:29

Try the NM_SETFOCUS[^] and NM_CLICK notification messages.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

Re: About Active Window And Receive Msg

JohnCz13-Jun-12 13:10

JohnCz

13-Jun-12 13:10

Since you are using nonstandard nomenclature, please define Root Window, Sub window and Child window. What is relationship between all windows?

In general message about gaining focus (by any means including mouse click) is sent to a window that is gaining focus and loosing focus.
If this window is a child window, the parent does not know about what child gained focus.
You have two choices: write code in the child window to notify parent window about gaining focus using custom defined message, or write windows hook that will receive messages before any window does and post a message from the hook procedure to a parent window.

In both cases you would pass a handle to a window that gains focus.

JohnCz

Active Directory

Hadi Dayvary10-Jun-12 19:08

Hadi Dayvary

10-Jun-12 19:08

Hi Is it possible to read hardware information from another computer in a network with Active Directory and WMI?

www.logicsims.ir

What CWinThread is pointed to by AfxGetApp

ForNow10-Jun-12 7:51

10-Jun-12 7:51

The documentation says <b>A pointer to the single CWinApp object for the application</b>

However that is not really true is it CWinthread::m_pMainWnd

If whitin a CDialog I create a Thread and populate the data area with that (CWnd *) CDialog then AfxGetApp will return that window

Richard MacCutchan10-Jun-12 7:55

10-Jun-12 7:55

ForNow wrote:
The documentation says

Which documentation; please provide links?

ForNow wrote:
However that is not really true is it CWinthread::m_pMainWnd

Again, no idea what you are looking at, but the actual documentation is here[^].

ForNow10-Jun-12 9:02

10-Jun-12 9:02

<a href="http://msdn.microsoft.com/en-us/library/5k9f064x(v=vs.80).aspx">http://msdn.microsoft.com/en-us/library/5k9f064x(v=vs.80).aspx</a>[<a href="http://msdn.microsoft.com/en-us/library/5k9f064x(v=vs.80).aspx" target="_blank" title="New Window">^</a>]

ForNow10-Jun-12 9:08

10-Jun-12 9:08

For some reason my pre tags aren't working sorry for thr giberich

I just googled AfXGetApp and the doc say the Thread pointed to My CWinApp

Richard MacCutchan10-Jun-12 22:01

10-Jun-12 22:01

Exactly so, but I still don't know what your question is. Aside from the fact that you still seem to be having trouble understanding the Windows model, the use of threads and MFC.

Erudite_Eric10-Jun-12 9:15

Erudite_Eric

10-Jun-12 9:15

How many more days do you want to spend trying to bend windows to do what you want?

Rather than try to make a worker thread a UI thread in order to get a message handler in it just add your own messaging. It is easy:

C++

MyThread()
{
WaitForEvent();
WhileNotMessageQueueEmpty()
{
ReadMessageOffQueue();
ProcessMessage();

}

}

somewhere in your code.....

C++

PutMessageOnQueue();
SignalQueueEvent();

and at shut down....

C++

SignalQueueEvent();

And domnt forget your queue needs to be protected with a lock so it it thread safe.

==============================

Nothing to say.

ForNow10-Jun-12 18:26

10-Jun-12 18:26

I am Using a UI thread