CObject derived classes and Memory Leaks - C / C++ / MFC Discussion Boards

Re: detect connection to internet without popping up dial-up

David Crow24-Apr-03 5:37

David Crow

24-Apr-03 5:37

Have you tried any of these:

http://www.pcausa.com/resources/InetActive.txt

Set Directory to save to

rbeat10024-Apr-03 4:14

rbeat100

24-Apr-03 4:14

Hi,

Im writing a program in C++, using the windows.h header file to develop an application. Im capturing images from a camera and then saving them in a default folder.

I want to allow the user to be able to browse through their file directories and choose which folder they want the images to be saved to. But, I cant find a simple solution. I would have thought there would have been a defualt control that allowed you to do this. But all the ones I have seen require you to set imagelists and things for the bitmaps to use for the folders.

I would GREATLY appreciate any help with this problem. Ive looked around on msdn, and on this site too. What is the easiest way to do it? Apart from simply asking the user to paste the folder path into a text box.

Cheers for any help

Re: Set Directory to save to

Rickard Andersson²⁰24-Apr-03 4:27

Rickard Andersson²⁰

24-Apr-03 4:27

rbeat100 wrote:
I want to allow the user to be able to browse through their file directories and choose which folder they want the images to be saved to.

Look up SHBrowseForFolder() in MSDN Library

Rickard Andersson⁸
Here is my card, contact me later!
UIN: 50302279
E-Mail: nikado@pc.nu
Interests: C++, ADO, SQL, Winsock, 0s and 1s

Re: Set Directory to save to

Maximilien24-Apr-03 4:31

Maximilien

24-Apr-03 4:31

ShBrowseForFolder is what you are looking for, search around codeproject for samples, and/or how-to.

Max.

Maximilien Lincourt
For success one must aquire one's self

Re: Set Directory to save to

rbeat10024-Apr-03 4:40

rbeat100

24-Apr-03 4:40

Thanks to you both for the quick responce Smile | :)

Ill give it a try.

Re: Set Directory to save to

basementman24-Apr-03 6:39

basementman

24-Apr-03 6:39

try this code:

BOOL BrowseForDir(char *cpPathName, HWND hParent)
{
BOOL bRetval = FALSE;

BROWSEINFO sBI;
memset(&sBI,0,sizeof(BROWSEINFO));

sBI.hwndOwner = hParent;
sBI.pidlRoot = NULL;
sBI.pszDisplayName = cpPathName;
sBI.lpszTitle = "Select the folder To Save To:";
sBI.ulFlags = BIF_RETURNONLYFSDIRS;
sBI.lpfn = NULL;

LPITEMIDLIST pidl = SHBrowseForFolder(&sBI);
if (pidl)
{
SHGetPathFromIDList(pidl,cpPathName);
bRetval = TRUE;
}

return bRetval;
}

Re: Set Directory to save to

Rickard Andersson²⁰24-Apr-03 11:46

Rickard Andersson²⁰

24-Apr-03 11:46

basementman wrote:
try this code:

Do you mean it doesn't work?
Can't try it but here is my code:

BROWSEINFOA bi;
memset(&bi, 0, sizeof(bi));
bi.hwndOwner = this->GetSafeHwnd();
bi.lpszTitle = "Select your dir";
	
LPITEMIDLIST itemList = SHBrowseForFolder(&bi);
if(!itemList) // pressed 'Cancel'
	return;

char* pathName = new char[1024];

if(!SHGetPathFromIDList(itemList, pathName))
{
	::MessageBox(NULL, "AAARRGH!! Invalid path!!!", "Error", MB_OK | MB_ICONERROR);
	return;
}

Rickard Andersson⁸
Here is my card, contact me later!
UIN: 50302279
E-Mail: nikado@pc.nu
Interests: C++, ADO, SQL, Winsock, 0s and 1s

CObject derived classes and Memory Leaks

zakkum24-Apr-03 3:55

zakkum

24-Apr-03 3:55

Hi.

I have two classes derived from CObject. They are leaking memory somehow.
What's wrong?

Memory Leaks!
0 bytes in 0 Free Blocks.
273 bytes in 6 Normal Blocks.
0 bytes in 0 CRT Blocks.
0 bytes in 0 Ignore Blocks.
268 bytes in 3 Client Blocks.
Largest number used: 3260 bytes.
Total allocations: 4732 bytes.
EXPLORER.DLL Terminating!
DLG.DLL Terminating!
WEB.DLL Terminating!
The thread 0xEB4 has exited with code 0 (0x0).

<br />
// MainFrm.h ---------------------------------<br />
<br />
class CModulExplorer : public CObject<br />
{<br />
	DECLARE_SERIAL(CModulExplorer)<br />
public:<br />
	CModulExplorer();<br />
	virtual ~CModulExplorer();<br />
	virtual void Serialize(CArchive& ar);<br />
<br />
	HICON	hSIcon;<br />
	HICON	hLIcon;<br />
	BOOL	bSystemFolder;<br />
	CString	sDefaultName;<br />
	CString	sNodeName;<br />
	CString	sPath;<br />
};<br />
<br />
class CModulWeb : public CObject<br />
{	<br />
	DECLARE_SERIAL(CModulWeb)<br />
public:	<br />
	CModulWeb();<br />
	virtual ~CModulWeb();<br />
	virtual void Serialize(CArchive& ar);<br />
<br />
	enum NavigationStyle {WNS_BLANK = 1014, WNS_LAST = 1015, WNS_DEFAULT = 1016};<br />
<br />
	HICON	hSIcon;<br />
	HICON	hLIcon;<br />
	NavigationStyle	ns;<br />
	CString	sDefaultName;<br />
	CString	sUrl;<br />
	CString	sNodeName;<br />
};<br />
<br />
class CMainFrame : public CMDIFrameWnd<br />
{<br />
	DECLARE_DYNAMIC(CMainFrame)<br />
public:<br />
	CMainFrame();<br />
<br />
// Attributes<br />
public:<br />
	CModulExplorer *m_pExplorerCls;<br />
	CModulWeb *m_pWebCls;<br />
...<br />
}<br />
<br />
<br />
// MainFrm.cpp --------------------------------<br />
<br />
IMPLEMENT_SERIAL(CModulExplorer, CObject, 0)<br />
IMPLEMENT_SERIAL(CModulWeb, CObject, 0)<br />
<br />
/////////////////////////////////////////////////////////////////////////////<br />
// CModulExplorer construction/destruction/serialize<br />
<br />
CModulExplorer::CModulExplorer()<br />
{<br />
}<br />
<br />
CModulExplorer::~CModulExplorer()<br />
{<br />
}<br />
<br />
void CModulExplorer::Serialize(CArchive& ar)<br />
{<br />
}<br />
<br />
/////////////////////////////////////////////////////////////////////////////<br />
// CModulWeb construction/destruction/serialize<br />
<br />
CModulWeb::CModulWeb()<br />
{<br />
}<br />
<br />
CModulWeb::~CModulWeb()<br />
{<br />
}<br />
<br />
void CModulWeb::Serialize(CArchive& ar)<br />
{<br />
}<br />
<br />
/////////////////////////////////////////////////////////////////////////////<br />
// CMainFrame construction/destruction/serialize<br />
<br />
CMainFrame::CMainFrame()<br />
{<br />
	CRuntimeClass* pClass = NULL;<br />
<br />
	pClass = RUNTIME_CLASS(CModulExplorer);<br />
	m_pExplorerCls = (CModulExplorer*)pClass->CreateObject();<br />
<br />
	pClass = RUNTIME_CLASS(CModulWeb);<br />
	m_pWebCls = (CModulWeb*)pClass->CreateObject();	<br />
}<br />
<br />
CMainFrame::~CMainFrame()<br />
{<br />
	delete m_pExplorerCls;<br />
	delete m_pWebCls;<br />
}<br />

ADO and big tables

ilgale24-Apr-03 3:54

ilgale

24-Apr-03 3:54

I have found that some ADO methods (Update, Delete)
doesn't work with tables having high number of fields.

Is this problem real ??
How can I manage big tables with ADO ?

Tanks a lot !

Re: ADO and big tables

Rickard Andersson²⁰24-Apr-03 4:24

Rickard Andersson²⁰

24-Apr-03 4:24

Huh!?
Can't be...

What error do you get? Or what doesn't work exactly?

Rickard Andersson⁸
Here is my card, contact me later!
UIN: 50302279
E-Mail: nikado@pc.nu
Interests: C++, ADO, SQL, Winsock, 0s and 1s

Re: ADO and big tables

ilgale24-Apr-03 4:35

ilgale

24-Apr-03 4:35

The 80004005 error is generated and the string in the exception is: "Query too complex"

This assertion is generated when I try to update an
existing record or to remove it.

Instead, when I try to add a new record and when I fill
it, or when I browse the big table, none exception is
generated !!!

I really don't know how to solve this problem !!!

Re: ADO and big tables

Rickard Andersson²⁰24-Apr-03 5:33

Rickard Andersson²⁰

24-Apr-03 5:33

Hm... don't know what i9t can be...

Are you sure that your SQL query is correct?

Rickard Andersson⁸
Here is my card, contact me later!
UIN: 50302279
E-Mail: nikado@pc.nu
Interests: C++, ADO, SQL, Winsock, 0s and 1s

Re: ADO and big tables

Toni7825-Apr-03 8:01

Toni78

25-Apr-03 8:01

Rickard is right. You usually get this error when your SQL statement is wrong but you say that this doesn't happen when you add a new record, so there could be some other reasons. For instance:
1. Make table names and column names shorter.
2. Reduce the number of columns in the table.

// Afterall I realized that even my comment lines have bugs

How to draw a transparent icon on top of another

Salvador Dali24-Apr-03 3:50

Salvador Dali

24-Apr-03 3:50

Hi,

I have two (or more) sets of icons that I want to use together to form a combination of icons. My icons have transparency, so I want to be able to draw one on top of the other, so that the one on the bottom shows through the transparent areas of the top.
Btw, I want to be able to draw this on any dialog.

Thanks in advance.

Re: How to draw a transparent icon on top of another

basementman24-Apr-03 6:43

basementman

24-Apr-03 6:43

See DrawIcon or DrawIconEx in the doc.

Working Set Tuner

Anonymous24-Apr-03 3:11

Anonymous

24-Apr-03 3:11

I have a problem using the WST utility.

I followed all the steps in creation of the exe and linking the wst.lib file to the linker.

i have my .wsp generated files in the c:\wst dir

but the moment i run the command
c:\wst:> wstune /o myfile.wsp
it gives me an error
wstune : using "myfile.wsp"

what could be the problem
can anyone give me the solution.

thanking you

Create a Window without lose my focus

Ricky_TheBard24-Apr-03 3:10

Ricky_TheBard

24-Apr-03 3:10

Hy everybody! Smile | :)

a little question...
I'm creating a invisible window (with create function), but when I do it my current app window loses his focus...
How can I create the window in the way that my current window don't loses his focus? Confused | :confused:

thanks all!
Cheers!

Ricky

Re: Create a Window without lose my focus

valikac24-Apr-03 6:54

valikac

24-Apr-03 6:54

One solution is to simply focus the parent window right after calling creating the child window.

kuphryn

How to embed one dialog resource to another?

kydfru24-Apr-03 3:03

kydfru

24-Apr-03 3:03

For example I have a dialog based project with tab control.
And there is some amount of dialog resources.
When I change tabs I need to include (embed) and switch those dialogs inside the main dialog.
I dig into ICQ dlls and found that they are using the same trick in dialog with tabs.

RE: only a suggestion...

Joan M24-Apr-03 3:18

Joan M

24-Apr-03 3:18

If it is possible use the property sheet, it's easier to maintain and to work with...

Yes! That's exactly what I want! Thanks!

kydfru24-Apr-03 3:42

kydfru

24-Apr-03 3:42

WSNMP32.DLL

David Cunningham24-Apr-03 2:56

David Cunningham

24-Apr-03 2:56

Hey all,

I'm working on a project and need to better understand and restrictions Microsoft has on the redistribution of these DLLs. As I understand it, they ship as part of W2K, but work on 98/ME as well. There are a few technical articles that outline how to use them for enumerating network adaptors and completing other SNMP tasks, but I can't find anything about restrictions on their use.

Anyone have any experience with them?

WSNMP32.DLL
MGMTAPI.DLL
MIB.BIN

David

Re: WSNMP32.DLL

obmit24-Apr-03 5:01

obmit

24-Apr-03 5:01

The windows 98 resource kit has an install for the MS SNMP Agent buried in here[^]

There is an snmpzp.exe file available here[^] for win95.

Also check KB139462.

UNZDLL.DLL

Dave_24-Apr-03 2:47

Dave_

24-Apr-03 2:47

Does anyone know anything about the UNZDLL.DLL? I am trying to find a way to extract archived .zip, .tgz, .tar files from within my application. There are dozens of commercial tools for this, all at a reasonable price (I guess). I just want to make sure that I'm not missing something obvious / easy before I go buying something.

I also found some MFC source that wraps the UNZDLL.DLL exported functions.

Thanks,

Dave

Re: UNZDLL.DLL

Brian Delahunty24-Apr-03 3:37

Brian Delahunty

24-Apr-03 3:37

There is a a good article here on CP.

http://www.codeproject.com/cpp/zip.asp[^]

You can use this set of classes to do the job for you.

Regards,
Brian Dela Smile | :)

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