char str[] help - C / C++ / MFC Discussion Boards

Re: Changing Label Size/Font help

CPallini21-Jan-10 3:23

CPallini

21-Jan-10 3:23

Dragondima wrote:
m_lblctrl1.SetFont(&lf);

Why don't you use

m_lblctrl1.SetFont(&font);

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: Changing Label Size/Font help

Dragondima21-Jan-10 3:26

Dragondima

21-Jan-10 3:26

Hey, thanks for the reply!

I tried this earlier, and got the same "error C2664: 'CLabel::SetFont' : cannot convert parameter 1 from 'CFont *' to 'LPFONTDISP'"

Re: Changing Label Size/Font help

CPallini21-Jan-10 11:28

CPallini

21-Jan-10 11:28

OK. Now I'm aware your CLabel is an ActiveX control. You have to use OleCreateFontIndirect [^].
Sample code here.
Smile | :)

Re: Changing Label Size/Font help

Dragondima22-Jan-10 3:03

Dragondima

22-Jan-10 3:03

Thanks for the reply!

I'm having a hard time getting the exgrid.dll to work, their examples give me a lot of errors. This was more for VS 6 i'm using 2008. I don't know if this would make a difference, i downloaded the file, but haven't had much success. Other suggestions would be greatly appreciated!

Reading and saving a class instance pointer [modified]

CODEPC21-Jan-10 3:08

CODEPC

21-Jan-10 3:08

Hi
I need to read and save a class instance pointer.

class A 
{
}
A* pClassA = new A();

I want to read and save "pClassA" from and to a file. What kind of data type it is? How many bytes it will take?

I am using CFile to do file IO.

Best regards,

modified on Thursday, January 21, 2010 9:15 AM

Re: Saving a class instance pointer

Cedric Moonen21-Jan-10 3:12

Cedric Moonen

21-Jan-10 3:12

Saving a pointer doesn't make any sense. A pointer is merely a memory address, how useful would that be ?
What you probably want to do instead is save the content of your object to the file. In that case, you will need to save each member variables separately.
I suggest you take a look at this article[^] (and the full series) to have a better understanding of serialization.

Cédric Moonen
Software developer

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

Re: Saving a class instance pointer

CPallini21-Jan-10 3:15

CPallini

21-Jan-10 3:15

Usually, that make no sense: a pointer contains the address of an object, so what is the purpose of storing it? If you need to store the class instance (i.e. the object itself) then you should look at serialization (Serialization on Wikipedia, Serialization in MFC).

Ah, of course the size of the pointer pClass is

sizeof(pClass)

char str[] help

xivShin21-Jan-10 1:10

xivShin

21-Jan-10 1:10

Hi I all a newbie here. need help with this:

char *strtok( char *str1, const char *str2 );
char str[] = "now # is the time for all # good men to come to the # aid of their country";
char delims[] = "#";
char *result = NULL;
result = strtok( str, delims );
while( result != NULL )
{
printf( "result is \"%s\"\n", result );
result = strtok( NULL, delims );
}

for char str[] , how can i assign it to a variable b? so far i get this error:
readin.cpp:34: error: initializer fails to determine size of ‘str

Thanks alot.

Re: char str[] help

CPallini21-Jan-10 1:28

CPallini

21-Jan-10 1:28

xivShin wrote:
char *strtok( char *str1, const char *str2 );

What's the purpose of the above line?

xivShin wrote:
char str[] = "now # is the time for all # good men to come to the # aid of their country"

Is the compiler complaining of the above line? Strange! What compiler are you using?
Smile | :)

Re: char str[] help

Garth J Lancaster21-Jan-10 1:35

Garth J Lancaster

21-Jan-10 1:35

first address the issue pointed out by the esteemed CPallini

then, try either

char str[74] = "now # is the time for all # good men to come to the # aid of their country";

or

char * str = "now # is the time for all # good men to come to the # aid of their country";

Re: char str[] help

Raj Indian21-Jan-10 1:35

Raj Indian

21-Jan-10 1:35

if b is a pointer:
char *b = str;
or
if b is an array and you need to copy the whole null terminated string to it:
#define SIZE 200 // or any suitable value
char b[SIZE];
strcpy( b, str );

One suggestion: please use meaningful names as variable names instead of b

Re: char str[] help

CPallini21-Jan-10 1:36

CPallini

21-Jan-10 1:36

Raj Indian wrote:
One suggestion: please use meaningful names as variable names instead of b

b is soooooooooo meaningful. Roll eyes | :rolleyes:

Re: char str[] help

loyal ginger21-Jan-10 1:38

loyal ginger

21-Jan-10 1:38

You don't have a variable b in your program. Therefore it's hard to determine what the message means -- we don't know the type of b. So you need to offer more details.

Re: char str[] help

Richard MacCutchan21-Jan-10 2:29

Richard MacCutchan

21-Jan-10 2:29

xivShin wrote:
for char str[] , how can i assign it to a variable b?

char* b = str;

But remember that b is merely a pointer to the same string. If you want a copy then you need to use strcpy() or some derivative.

MVP 2010 - are they mad?

CListCtrl text underline?

Arrin21-Jan-10 0:15

Arrin

21-Jan-10 0:15

Hello,
i need to show text underlined in CListCtrl when someone goes with the mouse over them, the text is always URL Adress,
and when the mouse is over a other cell it should be a just normal text!
My solution is not good, because the row is bigger then before and it dont restore the text to previos style when i move the mouse to other cell!
(I try with CDC, CFont, LOGFONT, CRect etc.!)

I hope that is understandable what i mean!?
Is there any way to do this!
(i think i see here a sample with this, but i cant find it!)

Thanx for any help!
Arrin

Re: CListCtrl text underline?

Raj Indian21-Jan-10 1:43

Raj Indian

21-Jan-10 1:43

Try CListCtrl::SetExtendedStyle()

refer: http://msdn.microsoft.com/en-us/library/bb774732(VS.85).aspx

ShellExecute

john563220-Jan-10 23:25

john5632

20-Jan-10 23:25

Hi,

I am trying to run a .bat file through command prompt using code via ShellExecute but not able to do so.

ShellExecute(NULL,_T("open"),_T("cmd.exe"),_T("b.bat iiso.img"),szDefaultDir,SW_SHOW);

I am getting command prompt but not able to execute command (bat file)?

Re: ShellExecute

Richard MacCutchan20-Jan-10 23:43

Richard MacCutchan

20-Jan-10 23:43

I think you may need the "/C" option to get cmd to run the batch file thus:

ShellExecute(NULL,_T("open"),_T("cmd.exe"),_T("/C b.bat iiso.img"),szDefaultDir,SW_SHOW);

MVP 2010 - are they mad?

Re: ShellExecute

john563221-Jan-10 0:25

john5632

21-Jan-10 0:25

Thank you, How to do in hidden mode?

Re: ShellExecute

Garth J Lancaster21-Jan-10 1:06

Garth J Lancaster

21-Jan-10 1:06

I think its a bit messy doing that this way .. but you can START a seperate process as hidden from within the CMD session though .. so I think the command becomes

/C START /B b.bat iiso.img

note the 'START /B'. If you go to a cmd session and do a 'help start' you'll see what I mean.

The different way is to have an exe that does a createprocess and sets hidden etc on the window. There a utility here (below) and doubtless others around that may help

http://www.ntwind.com/software/utilities/hstart.html[^]

hth

'g'

Re: ShellExecute

Richard MacCutchan21-Jan-10 2:22

Richard MacCutchan

21-Jan-10 2:22

john5632 wrote:
How to do in hidden mode?

I presume by using the SW_HIDE flag as the lastparameter.

MVP 2010 - are they mad?

Tracking balloon tooltip always appears below its tracking point

sashoalm20-Jan-10 23:21

sashoalm

20-Jan-10 23:21

I use the CBalloonMsg class from codeproject to display balloons, but I can't find a way to make it appear above its tracking point. The class uses the TTM_TRACKPOSITION message to position the balloon, but this message only takes one argument, which is the tracking point. How can I specify the rectangle of the body of the balloon?

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

waveOutWrite functions properly under WinXP but not under Win7

Markus Eschbacher20-Jan-10 23:05

Markus Eschbacher

20-Jan-10 23:05

I have a problem with my mfc application.
In the application I open an usb output device, prepare a data block for playback
and then send the data with waveOutWrite. Afterwards I unprepare the data block and
then I close the usb device.
Under Windows XP my program works properly but under Windows 7 it fails.
When I watch the usb interface with an analyzer I see that under WinXP the prepared data
block is sent but under Win7 there are only sent zero bytes and not the data block.

Why does my application not work under Win7?

I am thankful for your answers.

Re: waveOutWrite functions properly under WinXP but not under Win7

CPallini20-Jan-10 23:16

CPallini

20-Jan-10 23:16

Does waveOutWrite fails (did you check the return value)?
Could you please post the relevant code?
Smile | :)

Re: waveOutWrite functions properly under WinXP but not under Win7

Markus Eschbacher21-Jan-10 1:19

Markus Eschbacher

21-Jan-10 1:19

waveOutWrite does not fail.

Here is the relevant code:

OpenDevice_out();      // initialises the wave format and calls waveOutOpen ()
	PrepareBuffers_out();       // calls waveOutPrepareHeader ()
	
        mRes=waveOutWrite(m_hWaveOut, m_stWHDR_out, sizeof(WAVEHDR));
				
	if(mRes!=MMSYSERR_NOERROR)
	{
	     StoreError(mRes,FALSE,"File: %s ,Line Number:%d",__FILE__,__LINE__);
	     throw m_csErrorText;
	}

	UnPrepareBuffers_out();     // calls waveOutUnprepareHeader
	waveOutClose(m_hWaveOut);
	waveOutPause(m_hWaveOut);
	waveOutReset(m_hWaveOut);

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