Tutorial or Learning Tools. - C / C++ / MFC Discussion Boards

Re: any Idea for a Project?

Semion_N13-Jul-06 8:06

Semion_N

13-Jul-06 8:06

thank you!

SnaidiS(Semion)

Re: any Idea for a Project?

David Crow13-Jul-06 7:49

David Crow

13-Jul-06 7:49

One of the things that I used to do when I had time to kill was to pick a function, or an API, and write a whole program around it. I learned a lot this way.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: any Idea for a Project?

FarPointer13-Jul-06 8:58

FarPointer

13-Jul-06 8:58

Got to the MFC src file (..\Microsoft Visual Studio\VC98\MFC\SRC) it has lot of good code and will give you internal details about each thing.

Regards,
FarPointer
Blog:FARPOINTER

Re: any Idea for a Project?

Semion_N13-Jul-06 8:05

Semion_N

13-Jul-06 8:05

OK thank you!

SnaidiS(Semion)

Re: any Idea for a Project?

Semion_N13-Jul-06 9:02

Semion_N

13-Jul-06 9:02

OK-Thank you man!

SnaidiS(Semion)

GetKeyboardState();

Max++13-Jul-06 6:18

Max++

13-Jul-06 6:18

Anybody know,How to use GetKeyboardState()function?
Please give me some example about this?

Re: GetKeyboardState();

Randor 13-Jul-06 6:31

Randor

13-Jul-06 6:31

BYTE state[256];
GetKeyboardState((LPBYTE)&state);

if(state[VK_CONTROL] & 1)
{

...

}

Tutorial or Learning Tools.

WREY13-Jul-06 6:03

WREY

13-Jul-06 6:03

Does anyone know of any tutorial tools that might be helpful in getting up to speed with VC 8?

Time past, whenever MS came out with a new version of VC, they'd produce a CD for those who might need a little help getting acquainted with the product.

I've just barely become acquainted with VC 7, and now VC 8 has me stumbling all over the place.

Thanks.

Smile | :)

William

Fortes in fide et opere!

Re: Tutorial or Learning Tools.

David Crow13-Jul-06 7:45

David Crow

13-Jul-06 7:45

Three possibilities:

Ivor Horton's Beginning Visual C++ 2005[^]

Microsoft Visual C++ 2005 Express Edition Programming for the Absolute Beginner[^]

Enterprise Application Development with Visual C++ 2005[^]

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Problems of Updating contents in an Edit box in vc6

cppcook13-Jul-06 5:22

cppcook

13-Jul-06 5:22

Hi all,

I am writing a VC++6.0 application. I need to read from a text file and display the file content in an Edit Box. I use the following codes:

CEdit m_fileContent;
CFile pFile;
m_fileContent.SetWindowText(""); //clear
pFile.open(.....);
int length = pFile.GetLength();
CString* strContent = new CString("");
pFile.Read(strContent->GetBuffer(0),length);
m_fileContent.SetWindowText(strContent->GetBuffer(0)); //update file content
strContent->ReleaseBuffer(0);
delete strContent;
pFile.Close();

Now the problem is: When I first opened a file, it's fine. But When I opened a second file, if the length of the first file is longer than that of the second file, the content is not cleared. Any ideas? thanks,

Gavin

Re: Problems of Updating contents in an Edit box in vc6

Zac Howland13-Jul-06 5:30

Zac Howland

13-Jul-06 5:30

CEdit m_fileContent;
CFile pFile;
m_fileContent.SetWindowText(""); //clear
pFile.open(.....);
int length = pFile.GetLength();
//CString* strContent = new CString("");		// why are you putting CString on the heap?  This is a waste.
CString strContent = _T("");
pFile.Read(strContent.GetBuffer(0),length);
strContent.ReleaseBuffer();
m_fileContent.SetWindowText(strContent); //update file content
//strContent->ReleaseBuffer(0);	// need to do this before using the buffer anywhere
//delete strContent;		// not needed
pFile.Close();

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Problems of Updating contents in an Edit box in vc6

cppcook13-Jul-06 7:15

cppcook

13-Jul-06 7:15

Thanks a lot Zac and David!

Re: Problems of Updating contents in an Edit box in vc6

David Crow13-Jul-06 5:41

David Crow

13-Jul-06 5:41

Try:

CString strContent;
pFile.Read(strContent.GetBuffer(length), length);
strContent.ReleaseBuffer();
pFile.Close();
m_fileContent.SetWindowText(strContent);

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

How the application knows whether the machine is Laptop or Desktop?????

nagamohan_p13-Jul-06 5:04

nagamohan_p

13-Jul-06 5:04

Hi,

How the application knows whether the machine is Laptop or Desktop or Hand Held...I have tried win32_SystemEnclosure by using WMI but I'm getting the wrong info ie, what I'm expecting is not the one...

Is there any api call...Please suggest me or locate where I will get source code asap...

Regards,
nag.

Re: How the application knows whether the machine is Laptop or Desktop?????

David Crow13-Jul-06 5:34

David Crow

13-Jul-06 5:34

I'm not sure of anything that is 100% foolproof. In what ways does a laptop differ from a desktop? The presence of a battery is one difference. However, you can have a laptop on AC power without a battery. Can you use Win32_BIOS.TargetOperatingSystem, or the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProductName registry value, to determine if the device is a handheld or not?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: How the application knows whether the machine is Laptop or Desktop?????

Jun Du13-Jul-06 5:47

Jun Du

13-Jul-06 5:47

They don't. Whether a PC called "laptop" or "desktop" is rather arbitrary. OS doesn't care, except for some special OS like "Windows for Pocket PC".

Best,
Jun

Sound detection [modified]

Ivan Cachicatari13-Jul-06 4:48

Ivan Cachicatari

13-Jul-06 4:48

hi gurus,

how to detect the sound input and show this like messenger voice chat?

Thanks.

Ivan Cachicatari Blog[^]
www.latindevelopers.com

-- modified at 10:48 Thursday 13th July, 2006

code formatting style [modified]

aafcls13-Jul-06 4:19

aafcls

13-Jul-06 4:19

Hello,

This may seem like a simple question, but in Visual Studio is it possible to set coding style, specifically:

I like to write like this:

method<br />
{<br />
   for<br />
   {<br />
      statement<br />
   }<br />
}

but Visual Studio auto formats it like this (and I hate it!):

method<br />
   {<br />
   for<br />
      {<br />
      statement<br />
      }<br />
   }

How can I set it my way?

-- modified at 10:21 Thursday 13th July, 2006

Re: code formatting style

C^hris L^osinger13-Jul-06 4:22

C^hris L^osinger

13-Jul-06 4:22

your formatting got lost (try <pre> around your code).

if you're asking about bracket indentation, there's a setting in Tools / Options called "Indent braces" that might help

Cleek | Image Toolkits | Thumbnail maker

Inheritance problem

khb13-Jul-06 3:27

khb

13-Jul-06 3:27

Hi together,

I tried to compile the fdstream classes from www.josuttis.com with VC6, but didn't succeed. I cut down the code to what doesn't work:

#include <streambuf>
#include <istream>
 
class mybuf : public std::streambuf
{
protected:
	int m_i;
public:
	mybuf(int i) : m_i(i) {}
};
 
class myistream : public std::istream
{
protected:
	mybuf buf;
public:
	myistream(int i) : std::istream(0), buf(i) {}
};
 
int main(int argc, char* argv[])
{
	myistream strm(5);
	return 0;
}

On this code I get the following two errors:

error C2512: 'basic_istream<char,struct std::char_traits<char> >' : no appropriate default constructor available
error C2614: 'myistream' : illegal member initialization: 'istream' is not a base or member

I can't figure out what's the problem. It seems std::istream(0) isn't accepted, but I don't know why. Dead | X|

Can anyone help me?

Thank you very much in advance.

Regards,
Marcus.

Re: Inheritance problem

Zac Howland13-Jul-06 4:21

Zac Howland

13-Jul-06 4:21

khb wrote:
error C2512: 'basic_istream<char,struct std::char_traits<char=""> >' : no appropriate default constructor available

std::istream is a typedef for basic_istream<char, char_traits<char> >. basic_istream has the following constructor:

explicit basic_istream(basic_streambuf<Elem, Tr> *_Strbuf, bool _Isstd = false);

Do you really want your streambuf to be null? If so, try casting 0 as follows:

std::istream((std::streambuf*)0);

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Inheritance problem [modified]

khb13-Jul-06 5:13

khb

13-Jul-06 5:13

Yeah, the streambuf should to be null, as in the original implementation it is replaced by an instance of the inherited streambuffer class using rdbuf().

However, casting 0 to std::streambuf* results in the same errors.

If you have another idea on how I get the istream constructor called correctly, I would be really happy.

Thank you very much for your help,
Marcus.

Re: Inheritance problem

Zac Howland13-Jul-06 5:18

Zac Howland

13-Jul-06 5:18

Strange. Not sure why that would be a problem ... I was able to compile your code using g++ with no problems.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: Inheritance problem

earl13-Jul-06 5:20

earl

13-Jul-06 5:20

The original author is using VC6.

For the love of god, VS2005 Express is free. Get it.

earl

Re: Inheritance problem

Zac Howland13-Jul-06 5:25

Zac Howland

13-Jul-06 5:25

I realize that. Generally, GNU is more strick about things like this that Microsoft's compiler.

I have VS2005 Pro ... but it doesn't run on Linux, which is what I have to use at work.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

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