Re: C++ question. - C / C++ / MFC Discussion Boards

Jörgen Sigvardsson4-Sep-04 10:55

4-Sep-04 10:55

I doubt you can do lpBuffer=(LPBYTE)::GlobalLock(hIcon);.

See this MSDN article[^] for more information on icons and resources. It links to a program written in C which has some code you can look at too.

Please note that the structs in the article are wrong. Look at the code in the linked project instead. I believe you will have to fill out an entire ICONDIR, as icons are stored that way (an icon can contain several images). Then the appropriate number of ICONDIRENTRYs and ICONIMAGEs. That's what's supposed to be inside the resource part.

But you are talking about replacing the icon in one exe from another one. I believe you can do the copy without too much work. Just grab a pointer to the icon resource in the source exe, and use it to update the icon entry in the other exe. I think that should work. The linked project has all the details. Good luck Smile | :)

--
Arigato gozaimashida!

Re: Why doesn't this work?

Nemok4-Sep-04 11:11

Nemok

4-Sep-04 11:11

Well this is my problem: How can I grab a pointer from the resource (HICON)??? I was trying to do just that by using GlobalLock().
Do you know any other way to do this???

Re: Why doesn't this work?

Jörgen Sigvardsson4-Sep-04 11:13

Jörgen Sigvardsson

4-Sep-04 11:13

Read the MSDN article. It'll tell you what you can do with an HICON (hint: GetIconInfo() and build resource data from that)

--
Arigato gozaimashida!

C++ question.

WREY4-Sep-04 9:55

WREY

4-Sep-04 9:55

If I have the following:

struct Node
{
// various types
} *(*pNode)[7]; // ptr to a 2-dimensional array

===========================

In the ctor I have the following initialization procedure:

for(short i=0; i<7; ++i)
{
*(*(*pNode)+i) = NULL;
}

It doesn't work, and neither does various other efforts.

Later I want to do this:

**pNode = new Node;
(**pNode)->Lvl = 1;

etc.

==============================

If the array is not initialized, no object can be placed in it.

There is a reason why I DON'T want to define the pointer to the array as shown below (or something similar):

*pNode[5][7];

How can I initialized the array using the first example?

Thanks for any insight. I appreciate it.

Smile | :)

William

Fortes in fide et opere!

Re: C++ question.

cmk4-Sep-04 11:46

cmk

4-Sep-04 11:46

*(*pNode)[7] is the same as :
Node* (*pNode)[7];
And reads as : a pointer to an array of 7 Node pointers.
Two pointers, two things need to be allocated.

1.
*(*pNode)[7] you have two * and an index [7]
*(*(*pNode)+i) you have three * and an index i
These don't match.

Instead use either :
*((*pNode)+i) = NULL;
or,
(*pNode)[i] = NULL;

2. for( ...
Before you can initialize pNode you have to allocate it. Remember pNode is a 'pointer ...'.
i.e.
pNode = (Node*(*)[7])calloc(7, sizeof(Node*));
Also, by using calloc you don't need to loop to initialize.

3. **pNode = new Node;
What are you trying to do ? pNode is a pointer to an array. Here you only ever access first element.
You likely want to use syntax from 1. i.e. (*pNode)[i] = new Node;

Might be able to help more if you explain the context of its use.

...cmk

Save the whales - collect the whole set

Re: C++ question.

WREY4-Sep-04 12:20

WREY

4-Sep-04 12:20

Thanks for responding. I appreciate it.

Yes, you are very correct that by my doing the following:

**pNode = new Node;

I am only accessing the first of 7 Nodes. But then notice the next statement:

(**pNode)->Lvl = 1;

in which I start filling in data to that first node (which happens to be my root node). Later on, through the use of the "for" statement I begin to fill in the rest of the array this way (as an example):

for(short i=1; i<limit; ++i)
for(short j=0; j<7; ++j)
{
(*(*pNode+i)+j)->Lvl = *(lvlData+j);
(*(*pNode+i)+j)->lvlNode = *(nodeData+j);
... etc.
}

=============================

Inside the Node structure, there is still a third array to which I assign data this way:

*((*(*pNode+i)+j)->nodesUp+k) = *(nodeCnt+k);

=============================

It was the initial allocating of memory to the "j" level of the array that was holding me back.

Thanks for the help. I appreciate it.

Smile | :)

William

Fortes in fide et opere!

Re: C++ question.

WREY5-Sep-04 3:11

WREY

5-Sep-04 3:11

If you will kindly indulge me one more time, I forgot to mentioned that I'm using:

free(pNode);

to deallocate the memory. Is that OK, or should I do a 'delete' on the individual Nodes I dynamically created, BEFORE doing the 'free(pNode)'?

Thanks. I appreciate the use of your valuable time.

Smile | :)

William

Fortes in fide et opere!

Re: C++ question.

tomerab5-Sep-04 4:36

tomerab

5-Sep-04 4:36

Hi,
1.) struct Node
{
// various types
} *(*pNode)[7];

this is not a ptr to a 2-dimensional array. This is an array of ptr to ptr.
To make it clearer you can rewrite it:
typedef Node **PtrPtrNode;
PtrPtrNode ppNode[7];

2.) initilalize it as follows:
for (int i = 0; i < 7; i++)
{
pNode[i] = new (Node*);
*(pNode[i]) = new Node[5];
}

3.) filling a node is done as follows:
Node* pNodeArray = NULL;
for (int i = 0; i < 7; i++)
{
pNodeArray = *(pNode[i]);
for (int j = 0; j < 5; j++)
{
pNodeArray[j].Lvl = 0;
}
}

4) releasing:
for (int i = 0; i < 7; i++)
{
delete [](*(pNode[i]));
delete pNode[i];
}
}

I didn't compile it but I hope it's 'error free'
Regards, Tomer

Re: C++ question.

WREY5-Sep-04 6:02

WREY

5-Sep-04 6:02

Confer Lippman's "C++ Primer", page 414 (about 3/4 down the page) under Section 8.4.3, and see his example of a two dimensional array of which I similarly used.

I can quote you my references, quote me yours.

William

Fortes in fide et opere!

Re: C++ question.

tomerab5-Sep-04 19:31

tomerab

5-Sep-04 19:31

Sorry,
I was wrong Frown | :(

you were right Smile | :)

I was confused between *(*pNode)[7] and **pNode[7] which are two different things.

TreeView set check with InsertItem

LukeV4-Sep-04 7:00

LukeV

4-Sep-04 7:00

Hi,

is there a way to check an item when using InsertItem()? I'm trying to use SetCheck after InsertItem but it won't work!

How can I do that?

Thanks!

Multiple Dialog

Grahamfff4-Sep-04 5:59

Grahamfff

4-Sep-04 5:59

I have an MFC dialog based application containing several modeless dialogs.

A user has asked that one of the dialogs be multiple; i.e. the particular dialog displays data from an internal database and wants up to 5 instances of this dialog display showing various filtered views on he database.

So my question as I have all the code for managing the display dialog, can this dialog be made into an dialog array. Or are they another way extra instances of this dialog can be created.

Any suggestions for this unforeseen problem.

grahamfff

Re: Multiple Dialog

Anonymous4-Sep-04 8:10

Anonymous

4-Sep-04 8:10

That is the beauty of a class. All it's data objects are self contained. So, provided it is a modeless dialog, you can create as many instances of it as you like. And yes, you can do it from an array if you want too.

Re: Multiple Dialog

Grahamfff5-Sep-04 8:48

Grahamfff

5-Sep-04 8:48

Thanks for your post.

Just one question I can't see how to do an array of Modeless dialogs.

ANy help appreciated.

grahamfff

UNICODE problem.

Irek Zielinski4-Sep-04 5:43

Irek Zielinski

4-Sep-04 5:43

Hi to all

Recently I decided to move my application to UNICODE. All is near done (it complies and works (most of the time)) but I found a strange problem.

When I have some unicode string in for example WCHAR szTest[100] table - calling AfxMessageBox or SetWindowText on dialogs - displays unicode strings correctly.

But if I try to SetWindowText the same string into static control (or button) it shows a garbage text. Spy++ utility reports that those static controls and buttons are Unicode windows.

Any idea why it works this way?
Thanks for your time!
Irek

Check out my software at: http://www.ireksoftware.com

Re: UNICODE problem.

Michael Dunn5-Sep-04 6:14

Michael Dunn

5-Sep-04 6:14

If you're using VC 6, you need to manually edit the .rc file and change the dialogs to use MS Shell Dlg as the font instead of MS Sans Serif.

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
Laugh it up, fuzzball.
"That probably would've sounded more commanding if I wasn't wearing my yummy sushi pajamas."
-- Buffy

Re: UNICODE problem.

Irek Zielinski5-Sep-04 10:27

Irek Zielinski

5-Sep-04 10:27

Thanks Michael - that solved the problem. I wonder why it's not mentioned even a single time in MSDN...

Very best regards!
Irek

Check out my software at: http://www.ireksoftware.com

CDC GetWindowExt WinXP->Win98

FriendOfAsherah4-Sep-04 3:47

FriendOfAsherah

4-Sep-04 3:47

Hi GURUS
Ive transfered a program from WinXP back to Win98 (VC++6,MFC)
Trying to print on the same printer I get following problem:
Code:
m_PrintDC.SetMapMode( MM_HIMETRIC );
CSize winsize = m_PrintDC.GetWindowExt();

In WinXP I get the correct size of the window in HiMetric
(about 20100x27000) but in Win98 I always get 2450 x 2450 !!
I also cannot change (SetWindowExt, SetViewportExt ) to anything.
Calling m_PrinterDC.GetMapMode() results in MM_HIMETRIC !
The GetDeviceCaps(HORZSIZE)... works fine !.
But calling LineTo() with values in the range of the devicecaps is outside WindowExt/Org so it doesnt work -
Where does this difference come from ? Is there any default in XP which I have to Set for Windows 98. (another mapping mode ?)..
pls help, -> thx !

opening a wav file in programming visual c++

sysrye4-Sep-04 3:26

sysrye

4-Sep-04 3:26

i want to open a wav file and get the file from my drive c harddisk. what commands should be used to get the wav file??Thanks i really badly needed the commands.Thanksss!!!Help me out Smile | :)

Re: opening a wav file in programming visual c++

Joel Holdsworth4-Sep-04 5:34

Joel Holdsworth

4-Sep-04 5:34

http://www.wotsit.org/search.asp?page=8&s=music[^] <- This site should give you some help with that. It should give you the format of the data to read. Be careful when loading the sound data, as it could take up a lot of memory.

Joel Holdsworth

Re: opening a wav file in programming visual c++

Anonymous4-Sep-04 14:29

Anonymous

4-Sep-04 14:29

thanks a lot man!!! Smile | :)

Mapping COM port ????

zahid_ash4-Sep-04 2:38

zahid_ash

4-Sep-04 2:38

HI ,

I know the IP adress of other System. and it COM port name COM1.

I want to mapp it virtualy on my system.

How can i do it.
any sample

thanx

Regards.

About Windows Services

zahid_ash4-Sep-04 2:34

zahid_ash

4-Sep-04 2:34

HI,

As i know we can write Windows services for Windows 2000 and Windows XP .

Can we write them for Windows 98.
if yes , is it done in same way as for 2000 and XP.

or any change

thanx

Regards.

Simple PNG loading...

Joel Holdsworth4-Sep-04 2:17

Joel Holdsworth

4-Sep-04 2:17

I need a really Easy, Compatible and preferably Lightweight way to load PNG files to a DIB. I also need the alpha channel to be read correctly. So far I've looked at CxImage (rather heavyweight, and discontinued by David Pizzolero), libpng (very difficult to compile or link in MSVC7) and http://www.codeproject.com/bitmap/graphicsuite.asp[^] (but this requires a recent version of IE). Does anyone have any suggestions?

Joel Holdsworth

Re: Simple PNG loading...

C^hris L^osinger4-Sep-04 13:18

C^hris L^osinger

4-Sep-04 13:18

if you'll allow me a blatant advertisement, i can recommend my company's own library, ImgSource. it does tons more than just loading PNGs, but the linker will ensure that only the parts you use will get used, so you won't get penalized if you don't use it all. PNG support should add about 100K to your app.

here's a sample:

<br />
// three lines to get a PNG into a DIB<br />
HISSRC hSrc = IS3OpenFileSource(filename);<br />
HGLOBAL hDIB = IS3ReadImageToDIB(hSrc,...);<br />
IS3CloseSource(hSrc);<br />
<br />
BITMAPINFOHEADER *pDIB = (BITMAPINFOHEADER *)hDIB;<br />
<br />
...<br />
<br />
// delete it when you're done.<br />
GlobalFree(hDIB);<br />

-c

Software | Cleek

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