C / C++ / MFC Discussion Boards

Re: Ultimate Grid 6.1 (tab font)

lynchspawn21-Jun-05 4:41

lynchspawn

21-Jun-05 4:41

Is it possible that the mTab object hasn't been created yet (not a window yet)?

DLL question ( clueless )

Maximilien21-Jun-05 4:05

Maximilien

21-Jun-05 4:05

( in VC6 )

I have a DLL from a 3rd party.

there is only one function in the DLL which is declared like this in the simplist documentation :

int __stdcall Function( long,double*, long , long );<code><br />
<br />
in my code I do this : <br />
<br />
<pre>
 typedef int (*FunctionProc)(long , double*, long, long );
/// LoadLibrary and GetProcAdress work ( they don't return NULL )
///...
 double* p;
 int iRes = FunctionProc( 1, p, 2, 3 );
// cleanup ....
}</pre><br />
<br />
When I run this, I get a ESP error telling me the calling convention is not good between the DLL function and the function prototype I use.<br />
<br />
I changed the calling conventions of my sample project from __cdecl to __stdcall ( in the project settings ) and it looks like it works, the Function gets called without crashing.<br />
<br />
Is there a way to "transform" the function calling convention ? <br />
<br />
in my real application, I would like not to change the calling convention if possible, I don't really know the implications.<br />
<br />
Thanks.<br />
<br />
Max.<br />
 <br />
<br />
<hr><a href="http://www.thesorus.qc.ca">Maximilien Lincourt</a><br />
Your Head A Splode - Strong Bad

Re: DLL question ( clueless )

LCI21-Jun-05 4:15

LCI

21-Jun-05 4:15

I'd use __cdecl . It has always worked well for me in the past

Re: DLL question ( clueless )

Tom Archer21-Jun-05 4:15

Tom Archer

21-Jun-05 4:15

No because the caller has been built with a specified calling convention and the stack must be set up accordingly.

Re: DLL question ( clueless )

Antony M Kancidrowski21-Jun-05 4:24

Antony M Kancidrowski

21-Jun-05 4:24

Why not change the typedef

typedef int (__stdcall *FunctionProc)(long, double*, long, long);

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: DLL question ( clueless ) probably self-answered

Maximilien21-Jun-05 4:30

Maximilien

21-Jun-05 4:30

ok, I think I typo-ed somewhere ...

I do this :
typedef int ( __stdcall * FunctionProc)(long , double*, long, long );

and it seems to "work"...

Thank.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: DLL question ( clueless ) probably self-answered

Antony M Kancidrowski21-Jun-05 4:44

Antony M Kancidrowski

21-Jun-05 4:44

That is perfectly acceptable

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

SDI w/ splitter - SetActiveView()???

lynchspawn21-Jun-05 4:04

lynchspawn

21-Jun-05 4:04

I have an SDI app with a splitter and two views. The left view is a tree view and I'm trying to make the app come up with the last selection visible/active.

The menus/toolbars are indicating that the view is active but the focus/selection mark in the tree control acts as if it is not the active view. Part of the problem may be that the EnsureVisbile() call doesn't actually make it visible (the selection is hidden under a scroll bar). I don't know if that is what is causing the trouble or if the fact that the view really isn't the active view (in terms of mouse, keyboard) is why they EnsureVisible() isn't working (the chicken/egg thing).

I'm using a timer in the MainFrame and forcing the active view after 300ms using SetActiveView(). Is there something else I should be doing to make the view act as if I just clicked on the item? Any idea why the EnsureVisible() isn't placing the selected item within sight?

Thanks.

Reading a node value from XML file

LCI21-Jun-05 3:40

LCI

21-Jun-05 3:40

Can someone please tell me what i am doing wrong here. I can load the XML file fine but when i select the node that i want and try to retrieve the text, i get nothing back.

std::string value;
HRESULT hr;
MSXML2::IXMLDOMDocumentPtr pDocument;
MSXML2::IXMLDOMNodePtr ptagNode;

_bstr_t mybstrtagResponseKey = "//Response//ResponseKey";
_bstr_t mybstrtagResponseText = "//Response//ResponseText";

_bstr_t myxmlfile = "C:\\sample.xml";

// Create XMLDOMDocument
hr = CoInitialize(NULL);

hr = pDocument.CreateInstance("Msxml2.DOMDocument.4.0");

if (FAILED(hr))
{

}
try
{
// Load xml file.
if (pDocument->load(myxmlfile)!= VARIANT_TRUE)
{
}

else
{
ptagNode = pDocument->selectSingleNode(mybstrtagResponseKey);
//if text exists, get it...
while (ptagNode)
{
value = ptagNode->text;

}

}

}

Re: Reading a node value from XML file

Tom Archer21-Jun-05 4:24

Tom Archer

21-Jun-05 4:24

It doesn't appear that you're setting the root:

You're not setting the root:

MSXML2::IXMLDOMDocumentPtr plDomDocument = NULL;
MSXML2::IXMLDOMElementPtr pDocRoot;

HRESULT hr = plDomDocument.CreateInstance(MSXML2::CLSID_DOMDocument);
if (SUCCEEDED(hr))
{
BSTR xml = _com_util::ConvertStringToBSTR(response);
variant_t vResult = plDomDocument->loadXML(xml);
if (((bool)vResult) == TRUE) // success!
{
// now that the document is loaded, we need to initialize the root pointer
MSXML2::IXMLDOMElementPtr pDocRoot = plDomDocument->documentElement;
			
CComPtr<MSXML2::IXMLDOMNode> pDisp = pDocRoot->selectSingleNode(_T("Disposition"));
if (pDisp)
...

Re: Reading a node value from XML file

Tom Archer21-Jun-05 4:27

Tom Archer

21-Jun-05 4:27

By the way, in my code I'm loading the DOM object from memory (via loadXml) while you're doing it from disk (via load). However, the main issue is that you have to set the root and call its selectXXX functions to retrieve the desired elements.

Re: Reading a node value from XML file

LCI21-Jun-05 5:03

LCI

21-Jun-05 5:03

I learn something new everyday. This is awsesome. I must say, Tom, you really know your XML. I appreciate your help.

I have another question though...
After i retrieve the node value, it will be a blob of data. I have to search this blob and pick out certain pieces of data. I am currently looking to use std::string. Is there a cooler way to search text using XML instead of string? Or is string sufficient for this case?

using ifstream to read a file.

Hachaso21-Jun-05 2:12

Hachaso

21-Jun-05 2:12

Hi!

I'm creating a small program that reads from a text file, using ifstream.
I'm wondering how I can tell the stream to start reading the file from the beginning?

Is this possible or do I have to close the file and reopen it?

This is what I'm doing:

ifstream file(filename);

if(!file.is_open())
{
// Error message.
}

while(!file.eof())
{
file.getline(buf, 200);
// after comes more code that is not relevant here.
}

When I do this getline starts reading line by line.
So how can I tell it to start from the beginning?

Thanks!

Re: using ifstream to read a file.

xiaohe52121-Jun-05 3:17

xiaohe521

21-Jun-05 3:17

but why do you need to read from beginning again

I love Programming

Re: using ifstream to read a file.

Hachaso21-Jun-05 3:32

Hachaso

21-Jun-05 3:32

Well I need to get some more data from the file.

Is it possible or not?

Re: using ifstream to read a file.

S. Senthil Kumar21-Jun-05 3:34

S. Senthil Kumar

21-Jun-05 3:34

You can use the seekg method for that. Something like

ifstream input("C:\\Test.txt");

int txt = 0;
//Read a number
input >> txt;
cout << txt;

// Go back to beginning
input.seekg(0, ios::beg);

// Read the number again.
input >> txt;
cout << txt;

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Save & Open

suroor45321-Jun-05 1:52

suroor453

21-Jun-05 1:52

i made a linked list of nodes...! but i need to save my list of nodes on hard disk...
and i need to load this list when i open my program...
(it is a phonebook program in console application)

Re: Save & Open

ThatsAlok21-Jun-05 2:14

ThatsAlok

21-Jun-05 2:14

suroor_bio wrote:
it is a phonebook program in console application)

Where exactly are you facing problem buddy Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Save & Open

xiaohe52121-Jun-05 3:12

xiaohe521

21-Jun-05 3:12

class Photo
{
std::string sName;
std::string sPhoneNo;
}
class Photos
{
public:
Photos(std::string sFileName)
{
//readFromFile
}
bool SaveToFile(std::string sFileName);
private:
list<photo> lstPhoto;
}

I love Programming

Re: Save & Open

suroor45322-Jun-05 3:04

suroor453

22-Jun-05 3:04

I want to save the entry details on the hard disk
after entering it
then when I open the programe again I want the details to be entered to the list again
I APPROCIATE ANY HELP

#include
#include <list.h>typedef CList<phonebookentry *,="" phonebookentry="" *="">
PhoneBook;

struct PhoneBookEntry
{
CString Name,phone;

};

//***********************main************
switch (nChoice)

{
case 1: // add entry
PhoneBookEntry *pEntry;

pEntry = InputEntry();
g_PhoneBook.AddTail(pEntry);

break;

case 2: //list entries
pos = g_PhoneBook.GetHeadPosition();
while (pos)
{
PhoneBookEntry* pEntry = g_PhoneBook.GetNext(pos);
PrintEntry(pEntry);
}
}

//***********************************

PhoneBookEntry* InputEntry() //func. to enter details
{
PhoneBookEntry* pEntry = new PhoneBookEntry;

cout << "Enter new entry details:" << endl;

cout << " Name: ";
char cName[100];
gets(cName);

cout << " Phone: ";
char cOfPhone[100];
gets(cOfPhone);
pEntry->Name = cName;
pEntry->Phone = cOfPhone;
return pEntry;
}
//**********************************************

Crash when using EditSecurity function

Sudhir Mangla21-Jun-05 1:33

Sudhir Mangla

21-Jun-05 1:33

I am using the function inside a custom modal dialog. The arguments I pass are :the dialog’s window handle and the pointer to the object of a class in which I have implemented the IsecurityInformation interface with 2 additional functions of mine.
The application runs fine but crashes sometimes. The crash can be reproduced even when I just move the permission dialog. I think there is some problem in the implementation of the interface. I have tried with passing NULL as first argument but it crashes everytime.
The crash occurs in the Defwindowproc function

Sudhir Mangla

http://Programmerworld.net

(Free books , articles , Source Code and Programming Tools and Utilities)

Debugging Internet Explorer

munawar196821-Jun-05 0:58

munawar1968

21-Jun-05 0:58

I'm using windbg to debug an instance of iexplore.exe. In my test case, iexplore.exe loads a file a.htm (hello world).
Basically I want to step into the iexplore dissassembly the moment it loads a.htm into memory ..i.e before a.htm gets rendered... How do I do it? Help needed please.

Re: Debugging Internet Explorer

BlackDice21-Jun-05 6:25

BlackDice

21-Jun-05 6:25

I'm no expert, but that doesn't even sound like it'll work

My articles

www.stillwaterexpress.com

BlackDice

Caps Lock Indicator Problem !

AbinThomas21-Jun-05 0:41

AbinThomas

21-Jun-05 0:41

Hi,
I hav got an MDI application and a modal child dialog. Now i call this dialog using DoModal(). when i toggle 'CAPS Lock' key ,the ID_INDICATOR_CAPS in Mdi's Statusbar is not updated .
Can any one help me ...?

Thanks,
Abin Roll eyes | :rolleyes:

Re: Caps Lock Indicator Problem !

Cool Ju21-Jun-05 2:22

Cool Ju

21-Jun-05 2:22

Hi,
When u use domodal to display ur dialog, the focus will be only on the dialog and not on the parent window. Unless u close the dialog, the parent window cannot process any message. Try to use modeless dialog if u want ur parent window to process messages even when the dialog is displayed. Refer MSDN for more details.

Adios,
Ju Cool | :cool:

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