C / C++ / MFC

29-Aug-05 18:47

OK, two more then. I have managed to fix almost all my linking problems, except two, as follows:

nafxcw.lib(appcore.obj) : error LNK2001: unresolved external symbol ___argv
nafxcw.lib(appcore.obj) : error LNK2001: unresolved external symbol ___argc

Now, I've googled this message, but I've found nothing helpful, so any suggestions anyone has would be most appreciated.

Christian Graus - Microsoft MVP - C++

-- modified at 1:45 Tuesday 30th August, 2005

Wow - that's cool. The modification is as follows:

I'm building with /MT and using MFC in a static library. I found some stuff on google that says I need to use a shared library, but that's not possible, it will then not link with other libraries that I am using.

Rick York29-Aug-05 20:13

Rick York

29-Aug-05 20:13

try including stdlib.h in the app's stdafx.h file.

Christian Graus30-Aug-05 13:12

30-Aug-05 13:12

Doesn't help, and I didn't expect it to - this is a *linking* error.

Christian Graus - Microsoft MVP - C++

KaЯl29-Aug-05 21:22

KaЯl

29-Aug-05 21:22

Might these links help?

The problem: http://66.102.9.104/search?q=cache:nalL1InweC0J:curl.haxx.se/mail/lib-2002-10/0020.html+nafxcw&hl=en[^]
The answer: http://curl.haxx.se/mail/lib-2002-10/0021.html[^]

<marquee>- Not a substitute for human interaction -

Fold with us! ¤ flickr

Christian Graus30-Aug-05 13:00

30-Aug-05 13:00

Sadly, no. I know about this problem, it's how I solved all my other linker problems. I need to use /MT or the program won't compile at all, and I am indeed using it everywhere.

Christian Graus - Microsoft MVP - C++

Parent Window

Nishad S29-Aug-05 18:36

Nishad S

29-Aug-05 18:36

Hello,

I'm trying to create an application, which will be always at bottom Z order. I mean it must be behind all the windows in the desktop. My window may have buttons, edit boxes, etc.

How can I achieve this?

I think I must do all the things that the desktop window of WINDOWS do.

Thank you for valuable help.

Christian Graus29-Aug-05 18:43

29-Aug-05 18:43

::SetWindowPos has a BottomMost value, if you google SetWindowPos you will find it.

Christian Graus - Microsoft MVP - C++

Nishad S29-Aug-05 19:15

Nishad S

29-Aug-05 19:15

Thank you.

But I want to create a window that behave like the desktop window of WINDOWS. That is it must not come to top when I click on it or move or size it.

SetWindowPos will make it a bottom window, but when I click it it will become top. But the desktop window of WINDOWS will never come to top in any case.

Can you help me?

Christian Graus29-Aug-05 19:17

29-Aug-05 19:17

You can handle the click event and put it back to the bottom, apart from that I really don't know what you could do.

Christian Graus - Microsoft MVP - C++

Jörgen Sigvardsson29-Aug-05 20:02

Jörgen Sigvardsson

29-Aug-05 20:02

I suspect you'd need to handle the WM_ACTIVATE, WM_NCACTIVATE, WM_MOUSEACTIVATE messages. I don't know for certain, but I would start looking at those messages.

Need Help (classes and .h files)

John R. Shaw30-Aug-05 14:17

John R. Shaw

30-Aug-05 14:17

Note the desktop window is the ancestor of all windows, it can never come to the top.

You could probably override CWnd::SetWindowPos() so that the window itself has control over its own Z-order placement.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

SummoningDan29-Aug-05 18:06

SummoningDan

29-Aug-05 18:06

Ok to start things off i am a complete noob at programming, been trying to learn most of it myslef. Recently i made a property managment Database for the properties i own. I want to try and upgrade this program with implementing classes and Vectors. now im not sure what to do and how to transform it, i think the struct would go in the class in a .h file and the fuctions would go in the .cpp can someone please review the code below and give me a rough indercation of what to do.

----------------------------------------------------------------
#include <iostream>
#include <string>
#include <fstream>

using namespace std;

struct propertyInfo
{
string address;
string suburb;
int price;
};

void displayProperty (propertyInfo property);
void getProperty(propertyInfo &property, int &);
void displayLibrary(propertyInfo properties[], int &);
void displayFile(propertyInfo properties[], int &);
void search(propertyInfo properties[], int &);
void saveproperty(propertyInfo properties[], int &numProperties);
int displayMenu();

const int MAXPROPERTIES = 100;

int main()
{

int numProperties = 0;
propertyInfo properties[MAXPROPERTIES];
propertyInfo property = {};
displayFile(properties, numProperties);

int choice = displayMenu();
while (choice!=0)
{
switch (choice)
{
case 1: search(properties,numProperties);
break;
case 2: saveproperty(properties, numProperties);
break;
case 3: displayLibrary(properties, numProperties);
break;
case 4: getProperty(properties[numProperties], numProperties);
break;
case 5: return 0;

}

choice = displayMenu();
}

system("pause");
return 0;
}

void getProperty(propertyInfo &property, int & numProperties)
{
cout << "\nEnter address: " ;
getline(cin, property.address);
cout << "Enter suburb: ";
getline(cin, property.suburb);
cout << "Enter price: ";
cin >> property.price;
cin.ignore();
cout <<"property: " << property.address << ", " << property.suburb << ", " << property.price << " added";
numProperties++;
}

void displayProperty (propertyInfo property)
{
cout << property.price << " " << property.address << " " << property.suburb ;
}

void displayLibrary(propertyInfo properties[], int &numProperties)
{
cout << endl;
for(int t = 0; t < numProperties; t++)
{
displayProperty(properties[t]);
cout << endl;
}
}

void displayFile(propertyInfo properties[], int &numProperties)
{
string FileName = "";
string Extension = ".txt";
cout << "Enter property filename: ";
cin >> FileName;

FileName = FileName + Extension;

//Convert the sting into a char pointer in order to pass it to open()
const char * TheFile = FileName.c_str();

ifstream fin;
fin.open(TheFile, ios::in);
if(fin.is_open())
{
while (numProperties < MAXPROPERTIES && !fin.eof())
{
getline(fin, properties[numProperties].address);
getline(fin, properties[numProperties].suburb);
fin >> properties[numProperties].price;
fin.ignore(); // ignore new line character left after reading int
numProperties++;

}

fin.close();
}
else
cout << "Could not open filename: " << FileName << endl;
}

void search(propertyInfo properties[], int &numProperties)
{
int searchamount = 0;
cout << "Enter Search amount ";
cin >> searchamount;
cout << endl;

for (int z=0; z < numProperties; z++)
{
if (properties[z].price < searchamount)
{
displayProperty(properties[z]);
cout << endl;
}
}
}

int displayMenu()
{
int choice =0;
cout << "\nMenu:\n";
cout << "1 - Property Search" <<endl;
="" cout="" <<="" "2="" -="" save="" property="" list"="" <<endl;="" "3="" list="" all="" properties"="" "4="" add="" a="" property"="" <<endl;
="" "5="" exit"=""

="" cout<<="" "enter="" menu="" choice="" ";="" cin="">> choice;
cin.ignore(1);
return choice;
}

void saveproperty(propertyInfo properties[], int &numProperties)
{
string fileName = "";
string Extension = ".txt";
cout << "Enter filename: ";
cin >> fileName;
cout << "Property details saved to the file: " << fileName <

Christian Graus29-Aug-05 18:38

29-Aug-05 18:38

Hi.

You'll probably find this program more useful in the long run if you move it to a windows app instead of a console app. As for moving it to have classes, as it stands, it only needs one, the struct you've already defined, unless you want to move data access into a class perhaps.

I'd also suggest looking into using MSDE or something similar to store your data instead of a flat text file.

Christian Graus - Microsoft MVP - C++

SummoningDan29-Aug-05 18:51

SummoningDan

29-Aug-05 18:51

what im trying to do is get rid of the struct and turn it into a class.

Christian Graus29-Aug-05 18:54

29-Aug-05 18:54

replace

struct
{

with

class
{
public:

a class and a struct are the same thing, the only difference is that a class has private as default, and a struct has public. You can add constructors and methods to a struct, like I say, there is no real difference. Of course, if you create a class in a .h and .cpp file, then as your struct has no methods, you'd put it all in the .h file, the .cpp file would be empty except the #include of the header file. If you add methods, they would be declared in the header, and their body would be in the cpp file.

I recommend getting the build in wizards to build a class and add some methods, so you can see how it all gets laid out. Basically you put the class name and a :: before the name of the method in the .cpp file, to differentiate from global methods.

Christian Graus - Microsoft MVP - C++