Re: TryEnterCriticalSection() problem - C / C++ / MFC Discussion Boards

Cedric Moonen11-Jul-08 3:56

11-Jul-08 3:56

There's no magic way for doing that: you'll have to copy and paste part of the code you want to reuse in your new application. That's probably not an easy task...

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

Re: VC ++ help

sudhir_Kumar11-Jul-08 19:53

sudhir_Kumar

11-Jul-08 19:53

TRUE

-@SuDhIrKuMaR@-

how data is managed in CString class?

nisha0000011-Jul-08 3:12

nisha00000

11-Jul-08 3:12

Regards

Nisha

Re: how data is managed in CString class?

Mark Salsbery11-Jul-08 5:38

Mark Salsbery

11-Jul-08 5:38

You have the source code - use it! Smile | :)

I guarantee the info you find there will be more (or at least as) accurate than any response here.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

TryEnterCriticalSection() problem

SRKSHOME11-Jul-08 2:42

SRKSHOME

11-Jul-08 2:42

When I use TryEnterCriticalSection() I am getting an error as TryEnterCriticalSection' : undeclared identifier. I have included #define _WIN32_WINNT 0x0500 and windows.h in my header file. How can solve this problem?
Thanks in advance.

Re: TryEnterCriticalSection() problem

CPallini11-Jul-08 2:48

CPallini

11-Jul-08 2:48

Possibly you need an updated Platform SDK.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: TryEnterCriticalSection() problem

SRKSHOME11-Jul-08 2:54

SRKSHOME

11-Jul-08 2:54

I tried this on Windows XP and Vista as well.

Re: TryEnterCriticalSection() problem

CPallini11-Jul-08 2:57

CPallini

11-Jul-08 2:57

My point wasn't about the OS it was about the installed SDK. As the name implies, the SDK is a development tool, it doesn't come together with the OS, you need to download it from the Microsoft website.

Re: TryEnterCriticalSection() problem

SRKSHOME14-Jul-08 2:06

SRKSHOME

14-Jul-08 2:06

Thanks. I am able to compile it without any error now. I have incuded the definition _WIN32_WINNT=0x0502 in project settings instead of in the header file.

list box problem

sanjayvenkat11-Jul-08 2:19

sanjayvenkat

11-Jul-08 2:19

i need my list box to show the strings i add to it at runtime onebyone but the strings get listed finally after all operations are completed(all together)
what should be done for it??should any method be called after addstring method is called

Re: list box problem

CPallini11-Jul-08 2:32

CPallini

11-Jul-08 2:32

You may call UpdateWindow on your listbox.

Re: list box problem

David Crow11-Jul-08 2:53

David Crow

11-Jul-08 2:53

sanjayvenkat wrote:
what should be done for it??

You should employ a worker thread so that the primary thread can keep the UI updated.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Word frequency

flowingsun11-Jul-08 2:17

flowingsun

11-Jul-08 2:17

how many times a word is used in a sentence,or its frequency
eg:
“this is a dog and that is a pig”
result:
“is”:2
“and”:1
th:2
is:3
i:4
thank you!

Re: Word frequency

CPallini11-Jul-08 2:19

CPallini

11-Jul-08 2:19

How much money are you ready to invest in?
Big Grin | :-D

i.e. 'Please provide code' is not the best way to go on. Read posting guidelines.

Re: Word frequency

_AnsHUMAN_ 11-Jul-08 2:25

_AnsHUMAN_

11-Jul-08 2:25

flowingsun wrote:
how many times a word is used in a sentence,or its frequency
eg:
“this is a dog and that is a pig”

Your question

flowingsun wrote:
result:
“is”:2
“and”:1
th:2
is:3
i:4

You already know the answer. Very Smart!!!

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Word frequency

Michael Schubert11-Jul-08 2:38

Michael Schubert

11-Jul-08 2:38

flowingsun wrote:
thank you!

You're welcome!

Convert CString to int or float

Trupti Mehta11-Jul-08 2:06

Trupti Mehta

11-Jul-08 2:06

In Evc++4, I want to convert CString to int/float. I use the following code :

// CONVERT STRING TO INT
CString csValue;
GetDlgItem(IDC_OpNo_EDIT)->GetWindowText( csValue );
m_opNo = atoi((char*)(LPCTSTR)csValue);

The above code works, but only with the first digit, so If I enter 34, I only get 3 in m_opNo int. same happens with float atof.

Can anyone tell what changes ae required to get full digit from CString to int. Is I enter 34 I want 34 as int.

Thanks

Terry

Re: Convert CString to int or float

CPallini11-Jul-08 2:18

CPallini

11-Jul-08 2:18

int i = _ttoi(csValue);

double f = _tstof(csValue);

Re: Convert CString to int or float

Trupti Mehta12-Jul-08 0:38

Trupti Mehta

12-Jul-08 0:38

Thanks CPallini & everybody else.
This solved my problem for int's but not for float as _ttof or _tstof id not defined in tchar also. I am using eVc++4.0 with WinCE 5. I can't find the functions in eVC help or tchar.h file also & it throws compilation error :

error C2065: '_tstof' : undeclared identifier

Any other alternative to do the above task would be great.

Thanks

Terry

Re: Convert CString to int or float

CPallini12-Jul-08 2:40

CPallini

12-Jul-08 2:40

Well you can rool your own version:

#ifdef _UNICODE
#define _tstof wtof
#else
#define _tstof atof
#endif

Re: Convert CString to int or float

Trupti Mehta12-Jul-08 4:44

Trupti Mehta

12-Jul-08 4:44

Thanks CPallini for your quick response.

I entered your code on top of my file (after #includes) & used _tstof(csValue), but it gives me the same error for wtof. I also can't find wtof or _wtof in Help of Evc++4. wtoi is available but not wtof. TChar.h is included.

error C2065: 'wtof' : undeclared identifier

Any further help, please.

Thanks

Terry

Re: Convert CString to int or float

CPallini13-Jul-08 7:21

CPallini

13-Jul-08 7:21

If ypur system really doesn't provide wtof, you may consider to convert your wide character string into standard (i.e. ANSI) one, via WideCharToMultiByte), and then use atof.
Smile | :)

Re: Convert CString to int or float

Trupti Mehta14-Jul-08 1:04

Trupti Mehta

14-Jul-08 1:04

Hello,

Thanks. I tried the following way :

   CString csValue;
   GetDlgItem(IDC_PRICE_EDIT)->GetWindowText(csValue);
.....
       char* dest;
       WideCharToMultiByte(CP_ACP, 0, csValue, -1, dest, 10, NULL, NULL);
       float flt = (float)atof(dest);
       CString d(_T("Converted Float:"));
       d.Format(_T("%s %.2f"), d, flt);
       AfxMessageBox(d);

Using WideCharToMultiByte method, I put all values accordingly & converted to float using atof. I get the converted value. BUT as soon as the Converted .. msg box is displayed I also get "Assertion Failed!" :File thrdcore.cpp, Line 867 Abort/Ret/Ig. Retry or ignore doesn't respond so I have to select Abort. It points to
if (m_nDisablePumpCount != 0)
{
TRACE0("Error: CWinThread::PumpMessage called when not permitted.\n");
--------> ASSERT(FALSE);
}
of PumpMessage().

Where am aI going wrong can you point out? Do I need to change anything in Wide...(). AS dest is not initialized, I get warning message for that also.

I have also noted that in eVC++4 I get exceptions at Assert many times, any special reason?

Thanks

Terry

Re: Convert CString to int or float

CPallini14-Jul-08 1:47

CPallini

14-Jul-08 1:47

Trupti Mehta wrote:
Where am aI going wrong

You didn't allocate memory for the dest buffer.
The buffer should large enough to get the converted string. Hence you may write

int iLen = csValue.GetLenght(); 
char * dest = new char[iLen+1];
WideCharToMultiByte(CP_ACP, 0, csValue, -1, dest, iLen, NULL, NULL);
// Perform conversion to float
delete [] dest;

or, using a reasonably large array:

char dest[MAX_PATH+1];
WideCharToMultiByte(CP_ACP, 0, csValue, -1, dest, MAX_PATH, NULL, NULL);

Re: Convert CString to int or float

Trupti Mehta14-Jul-08 3:35

Trupti Mehta

14-Jul-08 3:35

Thanks CPallini, its working perfectly as expected. Got rid from all type casts.

Thanks a lot to all of you trying to solve my problem.

Thanks

Terry

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