C / C++ / MFC Discussion Boards

Re: taking a video from usb cam

Tim Craig11-Dec-09 18:26

Tim Craig

11-Dec-09 18:26

What is the compiler error? No one is going to type in your code and try to compile it.

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

Re: taking a video from usb cam

__erfan__11-Dec-09 23:09

__erfan__

11-Dec-09 23:09

do you have opencv installed on your system?

if(no){install opencv;}

add opencv include and source directories to your compiler setting and at the end
add the libraries in your project setting

cover a double x to char ???

a04.lqd11-Dec-09 8:10

a04.lqd

11-Dec-09 8:10

example:
double 5 cover to '5'.

Re: cover a double x to char ??? [modified]

Luc Pattyn11-Dec-09 8:45

Luc Pattyn

11-Dec-09 8:45

doubles typically don't fit in one char, however you can easily convert them to string.

that is so basic, is this your first day at programming?
I hope you are wise enough to learn from a book, study it from front to where ever you get, and look at examples and exercises.

The exact answer depends on the language you use, which you did not specify.
in good old C you could do it with an sprintf() or swprintf()

Here[^] is one page of doc, even wikipedia knows how!
Please make Google your daily friend.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

modified on Friday, December 11, 2009 2:51 PM

Re: cover a double x to char ???

CPallini11-Dec-09 11:28

CPallini

11-Dec-09 11:28

Sorry to say, I think you misunderstood the OP request: he wants to cover the double with a char. This is usually possible, provided the char is by repeated as needed. For instance consider the double 0.75:
if you repeat the char '*' four times over it, then you obtain a very good coverage.
Big Grin | :-D

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: cover a double x to char ???

Luc Pattyn11-Dec-09 11:52

Luc Pattyn

11-Dec-09 11:52

No problem, Microsoft invented a class[^] for that very purpose.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: cover a double x to char ???

CPallini11-Dec-09 23:55

CPallini

11-Dec-09 23:55

Nah, (Heretic!) that's for managed development.
Furthermore, as usual, they didn't invent it, just stolen it from Java...
Big Grin | :-D

Re: cover a double x to char ???

Richard MacCutchan12-Dec-09 1:52

Richard MacCutchan

12-Dec-09 1:52

I guess you probably mean convert; take a look at sprintf[^] and its variants.

print double array on openGL window???

a04.lqd11-Dec-09 7:51

a04.lqd

11-Dec-09 7:51

i have an double array u[100].
this code print "Hello 123" to openGL window, can i print u like this?

static char sbuff[20];

wsprintf(sbuff,"Hello %d",123);
OutText(0,yMax - 10,sbuff,GLUT_BITMAP_8_BY_13);

void OutText(float x,float y,char *text,void *font)
{
	glRasterPos2f(x,y);
	for(int i=0;text[i]!=0;i++)
	{
		glutBitmapCharacter(font,text[i]);
	}
	glutPostRedisplay();
}

Re: print double array on openGL window???

Richard MacCutchan12-Dec-09 1:50

Richard MacCutchan

12-Dec-09 1:50

This looks good, did you have a question about it?

Convert _variant_t to char*

lemonash11-Dec-09 7:01

lemonash

11-Dec-09 7:01

Hi folks!

Can anyone kindly tell me how to convert _variant_t to char*?

Thanks!

char Buf[100];
_variant_t var;
?

Re: Convert _variant_t to char*

Rolf Kristensen12-Dec-09 2:52

Rolf Kristensen

12-Dec-09 2:52

Found this with a quick google search:

<br />
char Buf[100];<br />
_variant_t var;<br />
if (V_VT(&var) == VT_BSTR)<br />
{<br />
    USES_CONVERSION;<br />
    cont char* pStr = OLE2T(var);<br />
    strcpy(Buf, pStr);<br />
}<br />

http://stackoverflow.com/questions/117755/is-there-a-faster-way-of-getting-a-char-from-a-variantt-than-const-charbs[^]
http://www.ddj.com/architect/184416822[^]

Re: Convert _variant_t to char*

lemonash12-Dec-09 4:11

lemonash

12-Dec-09 4:11

Dear Snakefoot,

Thank you very much!

I will do like this:

<br />
if (V_VT(&var) == VT_BSTR)<br />
{<br />
   strcpy(Buf, (const char*)(_bstr_t)var);<br />
}<br />

I don't like to use mfc and atl(USES_CONVERSION included in afxconv.h or atlconv.h), but thank you all the same for your kindness! Thumbs Up | :thumbsup:

Transparent Window in Remote desktop [modified]

Cvaji11-Dec-09 1:15

Cvaji

11-Dec-09 1:15

I have an MFC dialog which is made transparent usingSetLayeredWindowAttributes().
When i start this transparent window in my machine, i can't click.
When i connect this machine remotely from any other machine and when i try to click the background of that window, i can click.

I tried with different values for alpha in SetLayeredWindowAttributes() and i found that if alpha value is equals or above 5, behavior in both cases are same.

I want to disable the clicking of background of transparent window with alpha value as 1 in remote desktop also. Or any other way for displaying the background clicking in remote desktop

Please help me.

modified on Friday, December 11, 2009 7:24 AM

Re: Transparent Window in Remote desktop

Migounette11-Dec-09 6:09

Migounette

11-Dec-09 6:09

You can check if you are in remote:

Retrieves the Remote Desktop Services session associated with a specified process.

http://msdn.microsoft.com/en-us/library/aa382990(VS.85).aspx[^]

// 0 - Not Remote Session
// 1 - Remote Session
// -1 - Internal Error
//
int isRemoteSession()
{
DWORD sessId = 0;

if(ProcessIdToSessionId(GetCurrentProcessId(), &sessId) != 0)
{
return (sessId == 0) ? 0 : 1;
}

return -1; // Internal Error
}

For the rest, eliminate the alpha when needed

Difference between EndDialog and EndWindow?

Prabhu09200911-Dec-09 0:22

Prabhu092009

11-Dec-09 0:22

I have 2 queries, Kindly clarify it.

1. What is the difference between EndDialog() and EndWindow()?
2. Is it possible to use EndDialog for closing the modeless dialog?

Help me out!

Re: Difference between EndDialog and EndWindow?

Adam Roderick J11-Dec-09 0:42

Adam Roderick J

11-Dec-09 0:42

1. I never heard or used EndWindow. Confused | :confused:

2. For a modeless dialog, why you need EndDialog, i think it wont be needed usually, rather you have to use ShowWindow(SW_HIDE) mostly.Well if you use EndDialog, then you have initialize and dialog once again since it get destroyed on EndDialog.

Величие не Бога может быть недооценена.

Re: Difference between EndDialog and EndWindow?

Richard MacCutchan11-Dec-09 0:54

Richard MacCutchan

11-Dec-09 0:54

See the descriptions here[^] about how to use Dialog boxes correctly.

Re: Difference between EndDialog and EndWindow?

Rajesh R Subramanian11-Dec-09 1:30

Rajesh R Subramanian

11-Dec-09 1:30

Prabhu092009 wrote:
1. What is the difference between EndDialog() and EndWindow()?

EndDialog() is a standard Windows function, and there's no such thing as EndWindow.

“Follow your bliss.” – Joseph Campbell

error LNK2005:

Benjamin Bruno10-Dec-09 23:56

Benjamin Bruno

10-Dec-09 23:56

Hi all

While building my application the compiler shows

msvcrtd.lib(MSVCRTD.dll) : error LNK2005: __splitpath already defined in libcmtd.lib(splitpat.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: __getcwd already defined in libcmtd.lib(getcwd.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: _free already defined in libcmtd.lib(dbgheap.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: _calloc already defined in libcmtd.lib(dbgheap.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: _atoi already defined in libcmtd.lib(atox.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: _atol already defined in libcmtd.lib(atox.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: __CrtDbgReport already defined in libcmtd.lib(dbgrpt.obj)

How to resolve this .

Re: error LNK2005:

Rajesh R Subramanian11-Dec-09 0:02

Rajesh R Subramanian

11-Dec-09 0:02

Hi,

Here are the possible causes[^] why the linker might report this error.

“Follow your bliss.” – Joseph Campbell

Re: error LNK2005:

Richard MacCutchan11-Dec-09 0:55

Richard MacCutchan

11-Dec-09 0:55

See this answer[^] about Link order.

Re: error LNK2005:

KarstenK11-Dec-09 1:08

KarstenK

11-Dec-09 1:08

use /VERBOSE:LIB in the project settings.

You are using some single thread libs with multi thread libs.

Last rescue is /FORCE Unsure | :~

Press F1 for help or google it.
Greetings from Germany

Re: error LNK2005:

Benjamin Bruno11-Dec-09 20:10

Benjamin Bruno

11-Dec-09 20:10

Hi still I am not able to resolve this. Confused | :confused:

Re: error LNK2005:

KarstenK13-Dec-09 21:26

KarstenK

13-Dec-09 21:26

I am sorry for you.

Take out all user libraries dependencies of your project. Or start a new one. You need one that can be build. And than step for step include the libs until it doesnt work.

Press F1 for help or google it.
Greetings from Germany

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