C / C++ / MFC Discussion Boards

yu-jian14-Oct-13 5:37

14-Oct-13 5:37

It has two monitor, main and expand monitor.
The expand monitor in the top with higher resolution ratio， and the main minitor in the bottom.

But if I drag a window to the expand monitor and then double click to show maximium, it has problem, it cannot fill of the windows of the expand monitor? why ? It save the main monitor rectangle info, how to change it.

modified 15-Oct-13 5:13am.

Re: Dual monitor problem

Richard MacCutchan14-Oct-13 6:54

Richard MacCutchan

14-Oct-13 6:54

yu-jian wrote:
It has two monitor

What does - your PC or something else? And, what does this have to do with C++?

Veni, vidi, abiit domum

Re: Dual monitor problem

yu-jian14-Oct-13 23:12

yu-jian

14-Oct-13 23:12

I had resolved this problem,
Use EnumDisplayMonitors to judge which monitor the application is in.

And then set the new maxmium position for the application.

How to use DisableProcessWindowsGhosting in a VC6 application?

Erik13-Oct-13 20:14

Erik

13-Oct-13 20:14

Hi,

I need to set the DisableProcessWindowsGhosting(VOID) function in an application developed in VC6.0

The problem is that Windows.h that comes with that old programming environment does not know this function yet. What do I have to include in order to get access to that function?

Re: How to use DisableProcessWindowsGhosting in a VC6 application?

Richard MacCutchan13-Oct-13 20:45

Richard MacCutchan

13-Oct-13 20:45

You need to upgrade to a later version of Visual Studio or Visual Studio Express.

Veni, vidi, abiit domum

Re: How to use DisableProcessWindowsGhosting in a VC6 application?

Erik13-Oct-13 22:33

Erik

13-Oct-13 22:33

The problem is that my app still has to support Windows NT 4.0

Additionally, I guess it is part of the latest platform SDK available for VC6, I just wonder how to configure my project settings correctly...

Re: How to use DisableProcessWindowsGhosting in a VC6 application?

Richard MacCutchan13-Oct-13 22:47

Richard MacCutchan

13-Oct-13 22:47

You could try getting a later version of the Windows SDK, but you would still need a down version of the app for NT 4.0.

Veni, vidi, abiit domum

Re: How to use DisableProcessWindowsGhosting in a VC6 application?

Jochen Arndt13-Oct-13 23:42

Jochen Arndt

13-Oct-13 23:42

DisableProcessWindowsGhosting() is supported with XP SP1 and later. If your app must support older Windows versions, you must check the version. You can use late binding by getting the function address with GetProcAddress()[^]:

typedef void (WINAPI* LPFN_DisableProcessWindowsGhosting)();

HINSTANCE hInst = ::GetModuleHandle(_T("User32"));
if (hInst)
{
    LPFN_DisableProcessWindowsGhosting lpfnFunc = 
        (LPFN_DisableProcessWindowsGhosting)::GetProcAddress(hInst, "");
    if (lpfnFunc)
        lpfnFunc();
    else
        TRACE("DisableProcessWindowsGhosting() is not supported\n");
}

This will also solve your problem regarding the old SDK header files.

"Pure WIN32 Self-Extract EXE Builder" not working in Windows 7

Member 1023629813-Oct-13 12:59

Member 10236298

13-Oct-13 12:59

Even if I just try the demo it says "Fail to decompress the data, extracting process aborted!"

Pure WIN32 Self-Extract EXE Builder[^]

Re: "Pure WIN32 Self-Extract EXE Builder" not working in Windows 7

Garth J Lancaster13-Oct-13 16:17

Garth J Lancaster

13-Oct-13 16:17

well, you asked the question in the correct spot - on that article

Asking it here (again) is superfluous - if you dont get a response from hackzai you may have to narrow the issue down to a piece of code, and then post a specific question here with that code, rather than such an open question

'g'

Re: "Pure WIN32 Self-Extract EXE Builder" not working in Windows 7

Richard MacCutchan13-Oct-13 20:44

Richard MacCutchan

13-Oct-13 20:44

Please do not keep repeating the same question. Also, as this is in reference to a CodeProject article you should post in the forum at the end of the article so the author can help you.

Veni, vidi, abiit domum

Import binary .exe resource in VS2012?

Member 1023629813-Oct-13 12:37

Member 10236298

13-Oct-13 12:37

This image implies that you can simply import a binary ".exe" resource: http://i.stack.imgur.com/ITdYs.jpg

But how to do this in VS2012 c++? It does not allow me to import an .exe: http://i.stack.imgur.com/zdzbV.png

I'm trying this tutorial:
http://www.codeproject.com/Articles/4221/Adding-and-extracting-binary-resources

modified 13-Oct-13 20:58pm.

Re: Import binary .exe resource in VS2012?

Richard Andrew x6413-Oct-13 14:16

Richard Andrew x64

13-Oct-13 14:16

If you have a question about a particular article, you should post it at the end of the article.

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

Re: Import binary .exe resource in VS2012?

Member 1023629813-Oct-13 14:58

Member 10236298

13-Oct-13 14:58

Do you know how to solve this problem or not???

Single click self extracting .exe in Visual c++ 2012?

Member 1033375713-Oct-13 10:45

Member 10333757

13-Oct-13 10:45

I would like to build a self extracting .exe in Visual Studios c++ 2012.
Does anyone have a working solution for VS2012?

I checked projects like LZMA (7-zip SDK), but it doesn't seem to mention self extracting '.exe' anywhere.
http://ck.kolivas.org/apps/lrzip/lrzip-0.615/lzma/lzma.txt

I check NSIS and inno-setup, but those product don't seem to offer 1 click install.

I checked 'Chilkat v9.4.0' but that is not free!
http://www.chilkatforum.com/questions/2354/how-to-write-a-self-extractor-for-the-windows-os

Those codeproject.com files are so outdated that they give me a lot of errors in VS2012:
http://codeproject.com/Articles/4221/Adding-and-extracting-binary-resources
http://codeproject.com/Articles/7053/Pure-WIN32-Self-Extract-EXE-Builder

Memory leak with CString

Manoj Kumar Rai12-Oct-13 20:02

Manoj Kumar Rai

12-Oct-13 20:02

I have found a very interesting incident of memory leak in my code. Although I have not been able to find the root cause of the leak still thought to share with you all. I will really appreciate any help on this. I am rather curious to know how come a memory leak can be seen in use of CString in such a simple way.
Code:
We have a thread function:

C++

UINT __cdecl LogWriteThread(void *pParam)
{
  CLog* pLog = (CLog*)pParam;
  UNUSED_ALWAYS(pParam);
  try
  {
    pLog->LogWriteFunc();
  }
  .................
  .................
  return 0;
}

UINT __cdecl CLog::LogWriteFunc(void *pParam)
{
      ..........
      CString  cstrLogDataBuffer = m_cstrLogLine;
      m_cstrLogLine = _T("");
      CopyLogToFileByThread(cstrLogDataBuffer);
}

void CMpmLog::CopyLogToFileByThread(const CString& cstrLogDataBuffer)
{
      ....................
      const long iLength = cstrLogDataBuffer.GetLength();
      char *pBuffer = new char[iLength + 1];
      for (long iIndex = 0;iIndex < iLength; iIndex++)
      {
        pBuffer[iIndex] = (char)cstrLogDataBuffer.GetAt(iIndex);
      }
      pBuffer[iLength] = '\0';
        
      const unsigned int uiWriteLen = fwrite((const void *)pBuffer, sizeof(char),iLength, m_pofLogStream);

      delete[] pBuffer;
      ....................
}

========================
If I commment call for "CopyLogToFileByThread" in function LogWriteFunc then memory leak goes away. But thats not the solution.

Manoj
Never Gives up

Re: Memory leak with CString

Jochen Arndt12-Oct-13 22:31

Jochen Arndt

12-Oct-13 22:31

The shown code part of CopyLogToFileByThread() does not change a CString object. So this can't be the source of the leak it is from a CString object.

It seems that you are accessing the m_strLogLine CString object by multiple threads. When doing so, you must use locking. To do so, you may add a CCriticalSection member to your class and use this for locking:

CSingleLock singleLock(&m_CritSection);
singleLock.Lock(); 
CString cstrLogDataBuffer = m_cstrLogLine;
m_cstrLogLine = _T("");
singleLock.Lock();

Use similar code when changing or reading m_strLogLine anywhere.

One more note:
Instead of converting a TCHAR string to char by casting each char, you may use WideCharToMultiByte() or the conversion provided by CString:

C++

// This converts a TCHAR string to char string
CStringA strLineA(cstrLogDataBuffer.GetString());
fwrite(strLineA.GetString(), sizeof(char), strLineA.GetLength(), m_pofLogStream);

Re: Memory leak with CString

Manoj Kumar Rai13-Oct-13 9:05

Manoj Kumar Rai

13-Oct-13 9:05

Thanks Jochen for your inputs.

1. I have used CriticalSection while accessing m_cstrLogLine but have omitted those additional lines to focus on actual business logic.

2. I agree that WideCharToMultiByte() could have been a better option to convert string but I have changed code to rule out any leak during conversion itself.

3. The CopyLogToFileByThread() is not modifying string and thats why its surprising to have memory leak from that function.

4. One more point i will like to mention here is thhat this application has been built for WinCE 6.0.

I am trying to replicate the same issue with a test application and if possible for XP.

Manoj
Never Gives up

Re: Memory leak with CString

David Crow16-Oct-13 4:11

David Crow

16-Oct-13 4:11

Manoj Kumar Rai wrote:
I have found a very interesting incident of memory leak in my code.

How are you verifying this?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous

I don't know how to do!?

Suyeong12-Oct-13 17:06

Suyeong

12-Oct-13 17:06

POINT Point;
::GetCursorPos(&Point);
HWND hWnd = ::WindowFromPoint(Point);
::PostMessage(hWnd, WM_KEYDOWN, 'a', NULL);

I sent a message WM_KEYDOWN to hWnd.
It is activate on Windows Notepad..
but on games like need for speed, it isn't activate..

how do i do?

Re: I don't know how to do!?

Ron Beyer12-Oct-13 17:56

Ron Beyer

12-Oct-13 17:56

Thats because it probably doesn't use the windows message pump for keyboard and mouse interaction.

Re: I don't know how to do!?

Captain Price14-Oct-13 1:40

Captain Price

14-Oct-13 1:40

Games like need for speed doesn't use the usual windows messages system. Your application responds when your window gets the message through WindProc and the message loop. The way which is used in games is entirely different.

A cool video :- http://www.youtube.com/watch?v=XLCe-hQ8lgE[^]

"If A is a success in life, then A=x+y+z. (Work is x; y is play; and z is keeping your mouth shut.)"

visual studio 2008 QT project with c++

Mkhitar Sargsyan12-Oct-13 4:10

Mkhitar Sargsyan

12-Oct-13 4:10

Hello!

I had an error in my project created with QT and C++
I created Server which gets data from AudioInput and gives it to UDP Socket, there is no problem, but in Client's project I had a problem, when I tried to write data to AudioOutput device after UDP Socket gets this data from net

in my project error was in this line "int l = audioSource->read(audioBuffer,input);" in
"qaudiooutput_win32_p.cpp"

and this is Call Stack at time debugging which shows this

QtMultimediad4.dll!QAudioOutputPrivate::deviceReady() Line 579 + 0x1c bytes C++
QtMultimediad4.dll!QAudioOutputPrivate::qt_static_metacall(QObject * _o=0x00b53308, QMetaObject::Call _c=InvokeMetaMethod, int _id=1, void * * _a=0x00b51d20) Line 52 + 0x8 bytes C++
what I did wrong

PLEASE HELP!!!!! Frown | :(

Re: visual studio 2008 QT project with c++

Richard MacCutchan12-Oct-13 5:09

Richard MacCutchan

12-Oct-13 5:09

Mkhitar Sargsyan wrote:
what I did wrong

You forgot to tell us what the error was.

And please use <pre> tags around your code so it is readable, like so:

C++

int l = audioSource->read(audioBuffer,input);

Veni, vidi, abiit domum

Re: visual studio 2008 QT project with c++

Mkhitar Sargsyan13-Oct-13 23:35

Mkhitar Sargsyan

13-Oct-13 23:35

I wrote this code.

QByteArray getdata;
getdata.resize(socket->pendingDatagramSize());
socket->readDatagram(getdata.data(),getdata.size(),&senderaddres,&senderport);

then

qbufferout.open(QIODevice::ReadWrite);
audioOutput->start(ioDeviceout);
qbufferout.write(getdata);
qbufferout.close();

but I have got error at time this function "qbufferout.write(getdata);" and error goes to this line
"int l = audioSource->read(audioBuffer,input);" this line is in the "qaudiooutput_win32_p.cpp"

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