Re: Calculating the Number of Charcters in a Line Of a MultiLine Dialog Box - C / C++ / MFC Discussion Boards

Iain Clarke, Warrior Programmer15-Feb-09 22:35

15-Feb-09 22:35

1/ Please use the code block formatting, and the preview button - you'll be amazed how much easier your code is to read.

2/ As suggested, run your program with a pen and paper. You'll be surprised how much it helps.

3/ I'll give you a big clue you're already been given.

int smallest = 0;
if (j < smallest) { smallest = j; }

3a/
Think about how many numbers are smaller than zero. Are the numbers you've entering small than zero?
Changing it to 1 only makes things better than one.

3b/ You'll have the same problem with largest, if you type in all negative numbers.

Enjoy,

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: Help with a very basic program

LukeColowit17-Feb-09 2:52

LukeColowit

17-Feb-09 2:52

Initialize smalltest to the largest 4 byte integer :

int smallest = 4294967295 ;
if (j

Re: Help with a very basic program

Iain Clarke, Warrior Programmer17-Feb-09 7:32

Iain Clarke, Warrior Programmer

17-Feb-09 7:32

*I* know that... though I'd recommend using MAX_INT...

But I was trying to lead the obviously a homework question in the right direction.

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Play a wav file in a dll from an exe?

Hadi Dayvary15-Feb-09 10:37

Hadi Dayvary

15-Feb-09 10:37

Hi In my MFC dll I have this code in function:

HINSTANCE hInstance = AfxFindResourceHandle(MAKEINTRESOURCE(iID), RT_RCDATA);
return ::PlaySound(MAKEINTRESOURCE(iID), hInstance, SND_RESOURCE | SND_ASYNC | SND_NODEFAULT);

wave file is in resource of the dll, but when I call it from the exe, it can't play it, because it can not find it, (there is no RT_WAVE type!)
how can I play a wave file that is in a dll file?
Thanks

www.logicsims.ir

Calculating the Number of Charcters in a Line Of a MultiLine Dialog Box

ForNow15-Feb-09 10:16

ForNow

15-Feb-09 10:16

Hi,

I have a Multiline Dialog Box would anyone have the sequence

of Win32 SDK API calls to calculate/set the number of characters in a

Line of a Multiline Dialog Box

BTW I am using Rich Edit 2.0 though I don't think this has any

bearing on my question

Re: Calculating the Number of Charcters in a Line Of a MultiLine Dialog Box

Alexander ^M.,15-Feb-09 12:27

Alexander ^M.,

15-Feb-09 12:27

i guess it's done automatically

Don't try it, just do it! Wink | ;-)

Re: Calculating the Number of Charcters in a Line Of a MultiLine Dialog Box

Maximilien15-Feb-09 13:29

Maximilien

15-Feb-09 13:29

~~what about CRichEditCtrl::GetTextLength() ?~~

how dumb of me... shoulda read the whole thing.

what about getting the whole text and looking for CR-LF and counting the characters between them ?

This signature was proudly tested on animals.

Re: Calculating the Number of Charcters in a Line Of a MultiLine Dialog Box

ForNow15-Feb-09 14:42

ForNow

15-Feb-09 14:42

I am using Plains old C so EM_LINELENGTH

But if I cann't fit the Number of Characters I want on the Line

I would to some how want to make the font smaller ???

I guess I shoud re-prhase the question if I for Instance want 12

characters on one line of a MultiLine Dialog Box How Can I

calculate/set the right Font ??

how to change a row height in a splitter window?

Joseph Marzbani15-Feb-09 7:51

Joseph Marzbani

15-Feb-09 7:51

I'm useing MFC and have a SDI app with Doc/View architecture. The main window has got two pane horizontally. Now I'm gonna change their height programmatically; but how? Laugh | :laugh:

Thank you masters!

Re: how to change a row height in a splitter window?

Nuri Ismail15-Feb-09 8:59

Nuri Ismail

15-Feb-09 8:59

You can use the SetRowInfo and SetColumnInfo to change the size of the splitters. Have a look at this article for more info:

http://www.codeproject.com/KB/splitter/splitterwindowtutorial.aspx?fid=14064&df=90&mpp=25&noise=3&sort=Position&view=Quick&fr=26&select=1243952[^]

Re: how to change a row height in a splitter window?

Hamid_RT15-Feb-09 21:54

Hamid_RT

15-Feb-09 21:54

See here[^].

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

strange char* compile error?

George_George15-Feb-09 7:30

George_George

15-Feb-09 7:30

Hello everyone,

Anything wrong with my code below? I got the compile error!

typedef unsigned char       BYTE;

void foo(char* & p)
{
	return;
}

int main()
{
	BYTE *              buffer;
	// error C2664: 'foo' : cannot convert parameter 1 from 'char *' to 'char *&'
	foo ((char*)buffer);

	return 0;
}

thanks in advance,
George

Re: strange char* compile error?

Alexander ^M.,15-Feb-09 7:33

Alexander ^M.,

15-Feb-09 7:33

this isnt strange as foo required char*& and not char*.

Don't try it, just do it! Wink | ;-)

Re: strange char* compile error?

George_George15-Feb-09 7:39

George_George

15-Feb-09 7:39

My confusion is reference type is the same as original type, for example when type Foo is needed, we could pass Foo or pass Foo&. So, I think then char* & is needed I could pass char*? What is wrong with my understanding? Smile | :)

Re: strange char* compile error?

Rolf Kristensen15-Feb-09 7:53

Rolf Kristensen

15-Feb-09 7:53

BYTE is an unsigned char (8 bit)

char* is a pointer (32 bit)

When converting BYTE to char* then it needs to create a temporary variable. It is not possible to make return-by-reference with temporary variables.

Instead make the conversion from BYTE to char* by using a local variable, and then pass that local variable to the function.

Re: strange char* compile error?

George_George15-Feb-09 17:02

George_George

15-Feb-09 17:02

I agree with your points, but confused. Since I am using BYTE* not BYTE.

Anyway, could you show me your code please? I think code clarifies everything. Smile | :)

regards,
George

Re: strange char* compile error?

grassrootkit15-Feb-09 22:00

grassrootkit

15-Feb-09 22:00

Where is he converting a BYTE to char*? He's converting a BYTE* to char*. In other words, unsigned char* to char*. I think there's no problem with the pointer size.

this is enough:
foo ((char*&)buffer);

Re: strange char* compile error?

Stuart Dootson16-Feb-09 1:12

Stuart Dootson

16-Feb-09 1:12

It's all to do with the semantics of casting - you can't pass a reference to something you've produced with a cast, even if the size and location of the thing is the same.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: strange char* compile error?

«_Superman_»15-Feb-09 15:44

«_Superman_»

15-Feb-09 15:44

You must call it as below

char* pp = (char*)buffer;
foo(pp);

«_Superman_»

Re: strange char* compile error?

George_George15-Feb-09 17:02

George_George

15-Feb-09 17:02

Your code fixes my issue, but why? I think both your code and my code are of the same effect. Smile | :)

regards,
George

Re: strange char* compile error?

«_Superman_»15-Feb-09 18:16

«_Superman_»

15-Feb-09 18:16

When you typecast, you have to give the destination exactly as it should be.
So you could also typecast if as foo((char*& )buffer)

«_Superman_»

Re: strange char* compile error?

Stuart Dootson16-Feb-09 1:13

Stuart Dootson

16-Feb-09 1:13

It's all to do with the semantics of casting - you can't pass a non-const reference to something you've produced with a cast, even if the size and location of the thing is the same.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

How redraw images if screen resolution changes?

Supra215-Feb-09 4:09

Supra2

15-Feb-09 4:09

hi,
I have an application which loads some images. when I changes the screen resolution position of images gets changed. How to manage image position while changing the screen resolution.

Thanks

Re: How redraw images if screen resolution changes?

Alexander ^M.,15-Feb-09 7:34

Alexander ^M.,

15-Feb-09 7:34

what images? where are they displayed? how are they displayed?

Don't try it, just do it! Wink | ;-)

Re: How redraw images if screen resolution changes?

Hamid_RT15-Feb-09 21:52

Hamid_RT

15-Feb-09 21:52

You can check new resolution with GetSystemMetrics.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

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