Re: CComobox::DrawItem list box entries Disappears In Release Mode - C / C++ / MFC Discussion Boards

Hack Baba4-Dec-18 6:45

4-Dec-18 6:45

Thanks for taking time to reply to me bro.
Now, I would if i could what you told me but the problem is that i HAVE to make this project in Turbo C++ only and i know that this is ancient and i will go to hell for using it but plz try to help me with this project with the turbo Compiler

Re: String Search In C++

Richard MacCutchan4-Dec-18 8:49

Richard MacCutchan

4-Dec-18 8:49

It makes little difference which compiler you use. You still need to list out the strings you are reading from the file to see whether they match with the one you have typed in.

Re: String Search In C++

Joe Woodbury4-Dec-18 9:04

Joe Woodbury

4-Dec-18 9:04

You need to do the same thing for each file. This means breaking up your function into multiple functions. Hint: the new function would start at ifstream.

Re: String Search In C++

Hack Baba4-Dec-18 23:58

Hack Baba

4-Dec-18 23:58

I used cout<

Re: String Search In C++

Joe Woodbury5-Dec-18 6:21

Joe Woodbury

5-Dec-18 6:21

Think about the difference of using cout inside the loop and after the loop.

Re: String Search In C++

David Crow5-Dec-18 2:54

David Crow

5-Dec-18 2:54

Hack Baba wrote:
Plz also tell me how to search for the entered word in multiple files.

Take your code from the ifstream declaration down and move to a separate function. Create a loop that iterates each filename you wish to process, calling the aforementioned function with each filename.

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CComobox::DrawItem list box entries Disappears In Release Mode

ForNow3-Dec-18 16:10

ForNow

3-Dec-18 16:10

Hi
I have CBS_SIMPLE CBS_OWNERDRAWVARIABLE ComboBox that I populate via DrawItem using DrawText
everything works fine in debug mode and for that matter in release mode while under the Visual Studio Debugger

However When I run code in Release not under the debugger the list box entries appear for a instant and then disappear

Any Suggestion how to go about debugging would be appreciated

Re: CComobox::DrawItem list box entries Disappears In Release Mode

leon de boer3-Dec-18 17:43

leon de boer

3-Dec-18 17:43

Your code is relying on a local variable value to start zero and it won't be in release (they start unset usually just junk whatever was on the stack beforehand when it gets allocated) but in debug it zeros all local variables. It is one of the core differences between debug and release mode.
Usually its something like a bool flag that is assumed to start false (0) which won't in release mode as any non zero value means true.

Just check which local variable(s) you are assuming starts as zero and set the thing to zero manually Smile | :)

/* this will behave the same as someGoodFunc in debug but not in release */
void someWrongFunc (void)
{
    bool IamaBadBool;
}

void someGoodFunc (void)
{
    bool IamGoodBool = 0;
}

In vino veritas

modified 3-Dec-18 23:50pm.

Re: CComobox::DrawItem list box entries Disappears In Release Mode

ForNow4-Dec-18 1:44

ForNow

4-Dec-18 1:44

the only thing I can come with first is this piece of code
I only display part of the string in the list box

void Casidcombo::DrawItem(LPDRAWITEMSTRUCT pdi)
{
	ASSERT(pdi->CtlType == ODT_COMBOBOX);
	LPCTSTR lpszText = (LPCTSTR)pdi->itemData;
	
	ASSERT(lpszText == NULL);
	CDC dc;
	CWnd* phwnd = CWnd::FromHandle(pdi->hwndItem);

	dc.Attach(pdi->hDC);
	CString str(lpszText,8);   // Get the first 8 charcaters

and later write it out

C++

// Draw the text.
	dc.DrawText(
		str,
		(int)_tcslen(str),
	         &pdi->rcItem,
	 	 DT_CENTER | DT_SINGLELINE | DT_VCENTER);

However str is on the stack and would disappear after exiting draw item ?
I'll try it out

Re: CComobox::DrawItem list box entries Disappears In Release Mode

leon de boer4-Dec-18 7:41

leon de boer

4-Dec-18 7:41

Str is on the stack and will go bye bye as soon as you leave the function.

In vino veritas

Re: CComobox::DrawItem list box entries Disappears In Release Mode

Victor Nijegorodov4-Dec-18 8:27

Victor Nijegorodov

4-Dec-18 8:27

ForNow wrote:

dc.Attach(pdi->hDC);
   CString str(lpszText,8);   // Get the first 8 charcaters

and later write it out

C++

// Draw the text.
    dc.DrawText(
        str,
        (int)_tcslen(str),

BTW, if you are using CString then you have to use CString::GetLength(), not the C-runtime _tcslen(str).

Re: CComobox::DrawItem list box entries Disappears In Release Mode

Victor Nijegorodov3-Dec-18 20:27

Victor Nijegorodov

3-Dec-18 20:27

Have a look at this great Joe Newcomer's essay: Debug vs. Release

Re: CComobox::DrawItem list box entries Disappears In Release Mode

ForNow4-Dec-18 1:46

ForNow

4-Dec-18 1:46

thanks

How to resolve such exception?

Member 140527782-Dec-18 18:49

Member 14052778

2-Dec-18 18:49

Unhandled exception at 0x01F523BC (mfc140d.dll) in MProSet.exe: 0xC0000005: Access violation reading location 0xCDCDCDD1.

Re: How to resolve such exception?

CPallini2-Dec-18 20:41

CPallini

2-Dec-18 20:41

Your program is trying to access invalid memory. You should post the relevant code for further help.

Re: How to resolve such exception?

Richard MacCutchan2-Dec-18 23:45

Richard MacCutchan

2-Dec-18 23:45

You are likely trying to use an uninitialised pointer.

Re: How to resolve such exception?

Victor Nijegorodov3-Dec-18 0:50

Victor Nijegorodov

3-Dec-18 0:50

There are some Magic number (programming) - Wikipedia that one could find out while debugging (just look for "Microsoft" there)

SMS Access

Bram van Kampen2-Dec-18 15:20

Bram van Kampen

2-Dec-18 15:20

Is there any way of accessing the SMS System via the Internet. It runs as far as I understand over the same Physical Layer, with probably a different protocol.

Regards,

Bram

Bram van Kampen

Re: SMS Access

Richard MacCutchan2-Dec-18 23:47

Richard MacCutchan

2-Dec-18 23:47

There are websites that provide SMS services, although most require payment.

Re: SMS Access

Bram van Kampen3-Dec-18 14:52

Bram van Kampen

3-Dec-18 14:52

Well Richard,
That was not really my question. The Internet uses HTTP and TCP/IP protocols, the Mobile Phone service runs over the same physical network, but, with a different protocol. What is this different Protocol! Where is the Spec for it!

Regards,

Bram.

Bram van Kampen

Re: SMS Access

leon de boer3-Dec-18 15:46

leon de boer

3-Dec-18 15:46

From 2G onward it is is called GPRS
General Packet Radio Service - Wikipedia[^]

Quote:
GPRS extends the GSM Packet circuit switched data capabilities and makes the following services possible:

SMS messaging and broadcasting
"Always on" internet access
Multimedia messaging service (MMS)
Push-to-talk over cellular (PoC)
Instant messaging and presence—wireless village
Internet applications for smart devices through wireless application protocol (WAP)
Point-to-point (P2P) service: inter-networking with the Internet (IP)
Point-to-multipoint (P2M) service[citation needed]: point-to-multipoint multicast and point-to-multipoint group calls

On most devices if they have a GPRS client it will then use a standard GPRS AT command set which is something like a more advanced Hayes AT modem command set.

In vino veritas

modified 3-Dec-18 22:03pm.

Re: SMS Access

Richard MacCutchan3-Dec-18 21:49

Richard MacCutchan

3-Dec-18 21:49

Bram van Kampen wrote:
the Mobile Phone service runs over the same physical network

As far as I know the mobile phone service runs over a totally different physical and logical network using radio transmission. Details of the actual protocol used can be found by sms protocol - Google Search[^].

Using a selection

_Flaviu2-Dec-18 2:56

_Flaviu

2-Dec-18 2:56

Hi. What MFC control should I use in order to put a text in such a way that some text should have different background color, and most important, there will be several selection in this text, all of them with the same background color ...

I have tried with CRichEditView, and I could set a text color for several selection, but not color for background, only for text:

C++

SetWindowText(_T("Havecreatedonecomboclasstogetthecomboboxhandleandlistboxhandlevalue"));

CHARFORMAT cf;
cf.cbSize = sizeof(cf);
cf.dwMask = CFM_BOLD | CFM_COLOR;
cf.dwEffects = CFE_BOLD | ~CFE_AUTOCOLOR;

cf.crTextColor = RGB(0, 255, 0);
GetRichEditCtrl().SetSel(2, 5);
GetRichEditCtrl().SetSelectionCharFormat(cf);

cf.crTextColor = RGB(250, 55, 33);
GetRichEditCtrl().SetSel(10, 18);
GetRichEditCtrl().SetSelectionCharFormat(cf);

cf.crTextColor = RGB(250, 55, 33);
GetRichEditCtrl().SetSel(10, 18);
GetRichEditCtrl().SetSelectionCharFormat(cf);

GetRichEditCtrl().SetSel(-1, -1);

GetRichEditCtrl().SetReadOnly();

Re: Using a selection

Victor Nijegorodov2-Dec-18 9:12

Victor Nijegorodov

2-Dec-18 9:12

Did you try using CHARFORMAT2W | Microsoft Docs?

Re: Using a selection

_Flaviu2-Dec-18 23:24

_Flaviu

2-Dec-18 23:24

Yes, it goes. Here is the code, in case that everyone need it:

C++

CHARFORMAT2 cf;
cf.cbSize = sizeof(cf);
cf.dwMask = CFM_BACKCOLOR | CFE_AUTOCOLOR;
cf.dwEffects = CFE_PROTECTED;
cf.crTextColor = RGB(64, 255, 33);
cf.crBackColor = RGB(240, 64, 64);
GetRichEditCtrl().SetSel(18, 28);
GetRichEditCtrl().SetSelectionCharFormat(cf);

GetRichEditCtrl().SetSel(-1, -1);

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