C / C++ / MFC Discussion Boards

Re: display unicode text from into text box from utf database record

Richard MacCutchan22-Jun-10 4:14

Richard MacCutchan

22-Jun-10 4:14

Jayapal Chandran wrote:
I dont know mfc i want to be good in win32 API programming.

Then I suggest you follow my previous recommendation and get a copy of the free VS 2010 Express Edition C++ system, which will help you learn all about Win32 programming without any requirement to learn MFC.

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Re: display unicode text from into text box from utf database record

Jayapal Chandran22-Jun-10 5:11

Jayapal Chandran

22-Jun-10 5:11

I have(me and my friends) already got 2005 and i am a beginner to .net framework. Do i need the latest 2010 version?

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Re: display unicode text from into text box from utf database record

Richard MacCutchan22-Jun-10 5:59

Richard MacCutchan

22-Jun-10 5:59

The 2005 versions are also a bit old now as we have been through 2008 and are now on 2010. However it is not absolutely necessary to use the latest version if you are just learning; I leave it up to you to decide when to upgrade.

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Migration from VC 6.0 to Visual studio 2005

VC_RYK10-Jun-10 1:20

VC_RYK

10-Jun-10 1:20

Hi experts

I have to migrate some projects from VC 6.0 to visual studio 2005. Is Anything required to achieve it and what waht kind of problem i can face? As far as my knowledge is concerned, All upper version products automatically converts the project from older version to new one.

With regards
R Y K

Re: Migration from VC 6.0 to Visual studio 2005

C^hris L^osinger10-Jun-10 1:30

C^hris L^osinger

10-Jun-10 1:30

you will probably have to fix a lot of these:

for (int x=0...)
{
}

for (x=0;...)
{
}

the scope of the first x is limited to the first for loop, after VC6.

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Re: Migration from VC 6.0 to Visual studio 2005

David Crow10-Jun-10 2:59

David Crow

10-Jun-10 2:59

VC_RYK wrote:
Is Anything required to achieve it and what waht kind of problem i can face?

You will likely run into Unicode-related issues. That and variable scope are the two biggest issues I've faced when porting one to the other.

VC_RYK wrote:
As far as my knowledge is concerned, All upper version products automatically converts the project from older version to new one.

Yes, it converts the project, not the code.

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Re: Migration from VC 6.0 to Visual studio 2005

peterchen10-Jun-10 3:29

peterchen

10-Jun-10 3:29

Why VS2005? Consider VS2008 or VS 2010 (though the latter is a bit of a moving target still).

The step from VC6 to VS2005 is the big one though.

Upgrade Wizard will (try to) port your project files - this usually works ok - but you are alon wiht changes requried to your source code.

Compiler: VS 2005 provides improved standard compatibility, the most common issues being for scope, more rigorous checking of templates, and other minor things. For a list of breaking changes, see here[^] and here[^].

Unicode: Project settings now default to unicode. Moving from ANSI/MBCS to Unicode is a completely different story, you may want to take this as a separate step.

"Safe" CRT functions - many functions of the C/C++ Runtime will now generate a warnign that they should be replaced by safe counterparts - mostly to avoid potential buffer overflows and encourage more rigorous error checking. This is often a barrage of warnings, burying everything else under it. For more information, see here[^].

IDE + Build Performance - Get a really good computer. I mean it.

Windows Headers - we had some problems with some of the more arcane windows library headers moving some declarations around, requiring ugly include reordering and supressing some declarations being made / imported. That's unlikely to bite you, but can be an immense time sink.

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Call an .NET CF application with CreateProcess() under WinCE5.0

stefanu2110-Jun-10 0:54

stefanu21

10-Jun-10 0:54

Hello how are u?
I am new here and I have a great problem with my WinCE 5.0 application. I want to call an .NET application by my own developed prog (C/C++). I use the function
CreateProcess(_T("/flashdisk/app.exe"), NULL, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, NULL, &ProcInfo).
If I run my prog the CreateProcess function returns SUCCESS but the other prog cries " .NET CF Initialization Error!
The Application failed to load required components... Support info: -2147479552 (80001000)".
If I doubleklick the other program in the WinCE explorer the application starts with no error message.
Under WinCE6.0 I don't have this problem. Do I have to run an other application first before starting the other prog?

Message Removed

10-Jun-10 0:20

Alex@9C

10-Jun-10 0:20

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Re: Important Points for KT

Cedric Moonen10-Jun-10 1:30

Cedric Moonen

10-Jun-10 1:30

What's a KT ? D'Oh! | :doh:

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Important Points for KT

Richard MacCutchan10-Jun-10 2:28

Richard MacCutchan

10-Jun-10 2:28

I assume you are talking about a Knowledge Transfer; then why not spell it out so everyone can understand the question? However this forum is for C/C++/MFC questions so I suggest you post in General IT Issues, Collaboration or some more appropriate place.

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Re: Important Points for KT

Cedric Moonen10-Jun-10 2:47

Cedric Moonen

10-Jun-10 2:47

Richard MacCutchan wrote:
I assume you are talking about a Knowledge Transfer

Wow, I would never have thaught of that. We have enough acronyms out there: is we start giving acronyms to things like "Knowledge Transfer", were will we end Dead | X|

Oh I know, that's what they call txtspk Poke tongue | ;-P

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Important Points for KT

LittleYellowBird10-Jun-10 5:22

LittleYellowBird

10-Jun-10 5:22

Aaahhh, you have a bad case of RADYN's!!! Rose | [Rose]

(Repeated Acronym use Drives You Nuts! Big Grin | :-D

)

Ali

Re: Important Points for KT

Cedric Moonen10-Jun-10 8:11

Cedric Moonen

10-Jun-10 8:11

Precisely...
It is particulary annoying when you have to read some "papers" about any kind of technology (but the worse is for software) Dead | X|

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Important Points for KT

Richard MacCutchan10-Jun-10 5:43

Richard MacCutchan

10-Jun-10 5:43

Cedric Moonen wrote:
where will we end

Exactly; I usually have to go here[^] to find the answer. This was one of the few times when it came to me almost immediately. I must say I agree with you, people who post questions where the main item is a TLA (or TLA) are a PITA.

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Re: Important Points for KT

Niklas L11-Jun-10 2:09

Niklas L

11-Jun-10 2:09

Where PITA of course is an ETLA.

home

Re: Important Points for KT

Richard MacCutchan11-Jun-10 2:44

Richard MacCutchan

11-Jun-10 2:44

Niklas Lindquist wrote:
Where PITA of course is an ETLA.

Personally, I'd describe it as a FLA or a flatbread. Laugh | :laugh:

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Re: Important Points for KT

Tim Craig10-Jun-10 13:48

Tim Craig

10-Jun-10 13:48

A place I worked in the early 80s had at least three acronyms of MRP. It all depended on whom you were talking to.

Once you agree to clans, tribes, governments...you've opted for socialism. The rest is just details.

Re: Important Points for KT

CPallini10-Jun-10 3:00

CPallini

10-Jun-10 3:00

Richard MacCutchan wrote:
I assume you are talking about a Knowledge Transfer;

I suppose is "Klingon Therapy" instead. $Shucks | :-\$

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]

Problem in redrawing Rectangle on "Up Arrow Key Down" in MFC Dialog Based application

Arindam Tewary9-Jun-10 23:55

Arindam Tewary

9-Jun-10 23:55

Hi,

I am writing a small program in MFC using Dialog based project.
What I want to achive is : On pressing "Up Arrow Key" I want to redraw a rectangle which was already drawn.( want to draw the rectangle in other point).

Can you please help me what I am doing wrong here.

I am setting a variable "iKeyPressed" to "1" "PreTranslateMessage" method when Up Key is pressed.

BOOL CKeyDownTestDlg::PreTranslateMessage(MSG* pMsg)
{
	// TODO: Add your specialized code here and/or call the base class
    iKeyPressed = 0;
	if (pMsg->message == WM_KEYDOWN)
	{
		if(pMsg->wParam==VK_UP)
		{
			iKeyPressed = 1;
			CKeyDownTestDlg::OnPaint();
		 //::AfxMessageBox(_T("Inside"));              
		}
	}
	return CDialog::PreTranslateMessage(pMsg);
}

Then in OnPaint() method I am checking the value of "iKeyPressed". If that is "1", then I intend to "Redraw" (erasing out the previously drawn rectangle)rectangle which was drawn earlier.

void CKeyDownTestDlg::OnPaint()
{
	if (IsIconic())
	{
		//These code is not executed.
	}
	else
	{
		char c[10];
		
		CPaintDC dc(this); // device context for painting
		CString MFCString; 
		MFCString = c;
		if(iKeyPressed==0)
		{
			dc.Rectangle(5,5,100,20);
			AfxMessageBox(_T("iKeyPressed = 0"));     
			/*dc.SelectObject(old_brush);*/
		}

		if(iKeyPressed==1)
		{
			CPaintDC dc(this); // device context for painting
			AfxMessageBox(_T("iKeyPressed = 1"));      
			dc.Rectangle(5,5,20,100);			
		}
		CDialog::OnPaint();
	}
}

Interestingly, while executing I could see Message "iKeyPressed = 1".

Any help is appreciated.

Thanks,
Arindam D Tewary

Re: Problem in redrawing Rectangle on "Up Arrow Key Down" in MFC Dialog Based application

Aescleal10-Jun-10 0:14

Aescleal

10-Jun-10 0:14

You need to understand how WM_PAINT and OnPaint works. If you call your OnPaint at an arbitrary time what happens is it creates a CPaintDC which won't (or rather probably won't) have any invalid region in it. So all your drawing is clipped to a non-existent region and nothing appears on the screen.

Try calling Invalidate() instead of OnPaint() and see if that improves the situation. Can't remember the parameters off the top of me head so you'll have to look them up! This signals that you want to paint the whole window and will cause a redraw (i.e. your OnPaint()) will get called indirectly. When that happens CPaintDC will be set up properly.

Oh, and only have one object of type CPaintDC in a given OnPaint method, you might get some strangeness otherwise.

Cheers,

Ash

Re: Problem in redrawing Rectangle on "Up Arrow Key Down" in MFC Dialog Based application

CPallini10-Jun-10 0:26

CPallini

10-Jun-10 0:26

Arindam Tewary wrote:
BOOL CKeyDownTestDlg::PreTranslateMessage(MSG* pMsg)
{
// TODO: Add your specialized code here and/or call the base class
iKeyPressed = 0;

I think the iKeyPressed = 0 in the above code is you problem. Remove it and change the following piece of code

Arindam Tewary wrote:
if(iKeyPressed==1)
{
CPaintDC dc(this); // device context for painting
AfxMessageBox(_T("iKeyPressed = 1"));
dc.Rectangle(5,5,20,100);
}

This way

if(iKeyPressed==1)
{
  iKeyPressed = 0
  CPaintDC dc(this); // device context for painting
  AfxMessageBox(_T("iKeyPressed = 1"));
  dc.Rectangle(5,5,20,100);
}

BTW calling OnPaint directly is a bad idea: you should replace it with

InvalidateRect(...);
UpdateWindow();

sequence.

Re: Problem in redrawing Rectangle on "Up Arrow Key Down" in MFC Dialog Based application

Arindam Tewary10-Jun-10 0:38

Arindam Tewary

10-Jun-10 0:38

Thanks Mr. Palini for reply.

I just started VC++ MFC couple of days back. I am still not very much comfortable in it after comming from C# background. So I directly called that OnPaint method. I would keep learning about it in comming days for sure.

I used your suggestion but still it does not repaint it. Frown | :(

. Any other idea sir?

Thanks,
Arindam D Tewary

Re: Problem in redrawing Rectangle on "Up Arrow Key Down" in MFC Dialog Based application

CPallini10-Jun-10 1:02

CPallini

10-Jun-10 1:02

You should remove the Message Boxes calls to see it.
Also you're using too many device contexts in OnPaint.
Smile | :)

catching new

Sakhalean9-Jun-10 22:56

Sakhalean

9-Jun-10 22:56

Hi All,

How to catch the new allocation failure exception in MFC

I am using CMemoryException but it is not catching.
I am using bad_alloc exception that also it is not catching.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.