C / C++ / MFC Discussion Boards

Is there any way to set default view as thumbnail when Cfiledialog is
open?
//detail view as default
parent->PostMessage(WM_COMMAND, 40964, NULL);
I know there is a tip about how to set to detail at codeguru.com
I still have to get the code for thumbnail.

Thanks,
shin

How can a CAB get parameter from html ?

Hi, guys:
I have a CAB which contains a ATL based DLL. My question is How can I get some info from the html page?
I know the OBJECT and PARAM tag of html language is helpful to my question.
But I don't know how to implement it.

Any help or URL is much appreciating.

TIA

class racelist
{
public:
    // constructor
    racelist();
}

// body of constructor
racelist::racelist()
{
}

bwestend wrote:
the name of the classes constructor function:
racelist

bwestend wrote:
is this constructor part of the interface for this object?
Yes

bwestend wrote:
is this constructor part of the implementation for this object?
It depends on what you consider implementation, the body of the constructor is implementation, but the declaration isn't.

bwestend wrote:
how would this constructor be used in an object instantiated from this class?
racelist r;

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

I use the listbox for two purposes, for one, I need the sort on. For the other, the sort off so contents wont be sorted alphabetically.

How can I change that setting at with code at runtime?

Thanks!

Use ModifyStyle()

This is what I did to change from ascending to descending.
myListBoxCtrl.ModifyStyle(LVS_SORTASCENDING, LVS_SORTDESCENDING);

Cant figure out how to just remove LBS_SORT and nothing else. Dang!

Check out this web site

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_mfc_cwnd.3a3a.modifystyle.asp?frame=true

In Visual C++, i need to write a function which takes in an array of Strings as parameter, and this array of strings will be returned to the caller. How could i do it?
possible definitions i considered:
1) void Func(char *target[SIZE1][SIZE2]){//definition}
2) char [SIZE1][SIZE2] Func(void) {//definition}
3) void Func(char **target[SIZE1]) {//definition}
4) char *[SIZE1] Func(void) {//definition}
Are all the above definitions correct? Could you give example of definitions and relevant calling? I need to use character pointers to represent string and do other string operation.
Thanks in advance

Regards
World on the way

In reality, when talking about function parameters, these are the same:

<br />
void Func1(char *target[size]);<br />
void Func2(char *target[]);<br />
void Func3(char **target);<br />

A string is a pointer to a character. So an array of strings would be a pointer to strings, or a pointer to a pointer to a character. Here's a quickie example. Note that when passing in array pointers to functions, you need to pass in the size of that array. (Yet another reason to use classes..)

void Func(char **strings, int size)
{
  for(int i = 0; i < size; i++)
  {
     cout << "String " << i << " is: " << strings[i] << endl;
  }
}

You might allocate such an array like this:

int size = 10;
char **stringArray = new char * [size];
for(int i = 0; i < size; i++)
{
  stringArray[i] = strdup("Chimpanzee");
}

Since I just hacked this out right now, without a compiler, fixing any bugs is left as an exercise to the reader. Big Grin | :-D

If your nose runs and your feet smell, then you're built upside down.

Thanks for your fast response.
In fact I concern more about how to return an array of string. What I need to do is write a function which will take a long string and analyze this string, then return the array of substrings.
Another function is to take a bit stream as input parameter and return the substrings. I have tried my code, but it always cause compiling errors which frustrated me.
My code is as following.

void Func(char *longSourceString, char *subString[numOfSubStrings][subStringSize]) {/* process longSourceString which is a mix of single byte characters and double bytes or triple bytes characters */ }<br />
/* Calling part: */<br />
char targetBuffer[numOfSubStrings][subStringSize];<br />
Func(longSourceString, &targetBuffer);

As you see, i want get back the array of substrings. By the way, there is no way to use strtok() function here. And do i have any possible ways to use reference variable here? Is is valid to use a reference variable which refer to a pointer, a character pointer, an array?
Thanks in advance.

Regards
World on the way

void Func(CStringArray &arrayStr)
{
}

pass in a std::vector of std::strings. Pass it by reference. Don't use MFC container classes unless absolutely forced to, they are gay.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

Hi,

I have a custom toolbar created by my CMainFrame class. In the OnCreate handler for CMainFrame I add a CComboBox and a CEdit control. Both display hideously large text.

I've tried using SetFont() on both controls to change this but it only seems to affect the clipping area for the text within each control - the actual text is still drawn really big but this time cut-off. Surely I don't have to implement a User-draw just to change the font size do I?

Can anyone help please?

Many thanks,

S

Hi,
i encounter a similar problem in a combobox embedded edit control. if you managed to overcome this without drawing text through device context, your solution would be highly appreciated.
Thank you!

-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
Email: y_becker@netvision.net.il

Given these requirements for a console application:
Enter a series of integers seperated by whitespace. The first integer represents the quantity of integers to follow.
Ex. 3 5 18 21
or. 5 17 -46 3 198 2

I have been attempting the following to read the integers and store them in a vector:
scanf("%d", &cnt);
for(int i = 1; i <= cnt + 1; i++)
{
scanf("%d", &n);
aInts.push_back(n);
}

This works fine, unless someone enters fewer integers than the initial integer indicates. (ex. 3 19 5)
How can I test to see if the end of the input stream has been reached?

I have attempted the same type of logic using cin, to no avail.

Thank you in advance for your help.

First of all, scanf ? Are you required by your class to use C instead of C++ for streaming ? If so, why ? You're using STL anyhow.

Secondly:

for(int i = 1; i <= cnt + 1; i++)

why not

i < cnt ???

If you use cin, you can check the stream state to see if there is anything else there. The whole first integer represents the quantity idea is flawed IMO, you should just accept the line, and read the stream while it is good.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

Apparently some of my last advice was a little off. I've not done any C++ for a while now. The following is a complete solution that reads a line, then it extracts the numbers from the string, it assumes that only numbers are entered ( which is bad ), but it will only read the number of items you entered as the first digit, but if there is less, it just breaks and does not blow up. You could make it present an error if you'd like.

This is obviously your homework, and I ask you not to use this code unless you first do the research to be able to reproduce it yourself, and understand/explain what it does and how it does it.

<br />
<br />
#include <iostream><br />
#include <vector><br />
#include <string><br />
#include <algorithm><br />
<br />
using std::cin;<br />
using std::cout;<br />
using std::vector;<br />
using std::string;<br />
<br />
int _tmain(int argc, _TCHAR* argv[])<br />
{<br />
	string s;<br />
	int nCount;<br />
	int n;<br />
<br />
        // Read the entire line into a string, cin >> stops on a space<br />
	std::getline(cin, s);<br />
<br />
	int nPos = s.find(' ', 0);<br />
 <br />
        // extract the count<br />
	nCount = ::atoi(s.substr(0, nPos).c_str());<br />
<br />
	vector<int> vecInt;<br />
<br />
        // nStart will hold the position past the last space found ( i.e. the start of the next number )<br />
	int nStart = nPos + 1;<br />
<br />
	for (int i = 0; i < nCount; ++i)<br />
	{<br />
		nPos = s.find(' ', nStart);<br />
<br />
                // nPos will be -1 when no space is found.  I've not tested this with trailing spaces<br />
		if (nPos > 0)<br />
		{<br />
			vecInt.push_back(::atoi(s.substr(nStart, nPos).c_str()));<br />
			nStart = nPos + 1;<br />
		}<br />
		else<br />
		{<br />
                        // Grab the last number in the sequence and break.<br />
                        // The only reason to persist with the for loop is the requirement for a count to<br />
                        // be provided at all, and it does mean that if more numbers than the count are <br />
                        // input, they will be ignored.<br />
			vecInt.push_back(::atoi(s.substr(nStart, s.size()).c_str()));<br />
			break;<br />
		}<br />
	}<br />
<br />
        // The rest of this code is just about repeating the sequence to ensure it was input properly<br />
        // This could be done in one line using an adapter to pipe everything to cout via for_each,<br />
        // but I'm on work time and couldn't be bothered looking it up.  Man, I miss C++ though.....<br />
	std::vector<int>::iterator first = vecInt.begin();<br />
	std::vector<int>::iterator end = vecInt.end();<br />
<br />
	bool bFirst = true;<br />
<br />
	for(;first != end; ++first)<br />
	{<br />
		if (!bFirst) cout << ", ";<br />
		cout << *first;<br />
		bFirst = false;<br />
	}<br />
<br />
	cin >> s;<br />
<br />
	return 0;<br />
}<br />
<br />

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

Thanks for your reply.
This is actually not a school assignment, though it is very similar to the assignments I was given in C and C++ class. This is a "test" I was given at work. I was able to make it work nicely by reading everything as one long string and parsing it myself but, for reasons that escape me, I was asked to re-do it. The "boss" said I can use any references I like to get this accomplished.
I attempted scanf out of desperation! I could not get cin to work like I wanted it to work.
Thanks for your help.

roger

Has anybody here worked on LSP? I'm looking in developing an LSP to redirect the TCP calls to a file? Has anybody tried it? any suggestions/sample code? I've already have gone through the sample comes with the Platform SDK feb 2003.

Thanx

mustcat

almost a homework question!

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

what exactly do you mean? it's too simple just go ahead and do it Smile | :)

maybe for you cuz I'm even stuck on debuging the sample code right now Confused | :confused:

here is the error you maybe able to help me... I've already downloaded the symbols and also checked the "Load COAF & Export" under Tools-->Options-->Debug tab

Loaded 'C:\WINNT\system32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINNT\system32\rpcrt4.dll', no matching symbolic information found.
Loaded 'C:\WINNT\system32\ws2help.dll', no matching symbolic information found.
Loaded 'C:\WINNT\system32\OLE32.DLL', no matching symbolic information found.

Thanx
BTW as for the redirector, do you have sample code you can share... it's an important homework I would appreciate your help Sigh | :sigh:

mustcat

Hi all,
I have an application that I like to debug but I get the following error

Preloaded symbols may not match 'E:\instlsp.exe'.
Loaded 'C:\WINNT\system32\ntdll.dll', no matching symbolic information found.
Loaded '\\Farjomandi-l\Main\WINNT\system32\NTDLL.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\system32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINNT\system32\KERNEL32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\system32\ADVAPI32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\system32\rpcrt4.dll', no matching symbolic information found.
Loaded 'C:\WINNT\system32\ws2help.dll', no matching symbolic information found.
Loaded 'C:\WINNT\system32\USER32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\system32\GDI32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\system32\OLE32.DLL', no matching symbolic information found.
The thread 0x608 has exited with code -1 (0xFFFFFFFF).
The program 'C:\RemoteDebug\LSP\Debug\instlsp.exe' has exited with code -1 (0xFFFFFFFF).

how should I setup my project setting to avoid this error and enabling me to debug my app.
thanx

mustcat

In my program, I allocated a 2D array and it works, the first time the function runs. The debugger seems to blame free() for some reason. The program freezes completely and seems to go into some sort of infinite loop, which is strange because the code is nowhere near an infinite loop. What could possibly be causing this?

-- Steve

perhaps posting your code would be a start. Why do you think it's in an infinite loop ? How do you deallocate the array ? When do you ?

See how much easier this will be when you post the code ? D'Oh! | :doh:

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

I am writing an application that open multiple sockets to a server. A number of threads (about 10) are each given a pointer to functions previously resolved from a DLL that handle the sockets.

My code works fine for 1-4 threads, but any more than that and WSAEnumNetworkEvents() returns a socket error. My code is in a DLL and have two global variables SOCKET* pSocket and WSAEVENT* hEvent.
I know that multiple threads cannot safely access the same value, so I made them pointers and each time a thread calls this function the new operator allocates memory to the value. Is this ok?

The code I use for socket connection is show below:

WORD wVersionRequested = MAKEWORD(2,0);
WSADATA wsaData;
int nRet;

nRet = WSAStartup(wVersionRequested, &wsaData);
if(nRet) {
    //AfxMessageBox("WSAStartup()");
    WSACleanup();
    return -1;
}

if(wsaData.wVersion != wVersionRequested) {
    //AfxMessageBox("WinSock version not supported");
    WSACleanup();
    return -1;
}

LPHOSTENT lpHostEntry;

lpHostEntry = gethostbyname(lpServerName);

if(lpHostEntry == NULL) {
    //AfxMessageBox("gethostbyname()");
    WSACleanup();
    return -1;
}

SOCKADDR_IN sa;
sa.sin_family = AF_INET;
sa.sin_addr = *((LPIN_ADDR)*lpHostEntry->h_addr_list);
sa.sin_port = htons(nPort);

pSocket = new SOCKET;
*pSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(*pSocket == INVALID_SOCKET) {
    //AfxMessageBox("socket()");
    WSACleanup();
    return -1;
}

hEvent = new WSAEVENT;
*hEvent = WSACreateEvent();
if(*hEvent == WSA_INVALID_EVENT) {
    AfxMessageBox("WSACreateEvent()");
    closesocket(*pSocket);
    WSACleanup();
    return -1;
}

nRet = WSAEventSelect(*pSocket, *hEvent, FD_READ|FD_CONNECT|FD_CLOSE);
if(nRet == SOCKET_ERROR) {
    AfxMessageBox("EventSelect()");
    closesocket(*pSocket);
    WSACloseEvent(*hEvent);
    WSACleanup();
    return -1;
}

nRet = connect(*pSocket, (LPSOCKADDR)&sa, sizeof(SOCKADDR_IN));
if(nRet == SOCKET_ERROR) {
    nRet = WSAGetLastError();
    if(nRet == WSAEWOULDBLOCK) {
        //AfxMessageBox("Connect would block");
    }
    else {
        //AfxMessageBox("connect()");
        closesocket(*pSocket);
        WSACloseEvent(*hEvent);
        WSACleanup();
        return -1;
    }
}

WSANETWORKEVENTS events;
while(1) {
    DWORD dwRet;
    dwRet = WSAWaitForMultipleEvents(1,
        hEvent,
        FALSE,
        5000,
        FALSE);
    if (dwRet == WSA_WAIT_TIMEOUT) {
        AfxMessageBox("Wait timed out1");
        closesocket(*pSocket);
        WSACloseEvent(*hEvent);
        return -1;
    }

    nRet = WSAEnumNetworkEvents(*pSocket, *hEvent, &events);

    if (nRet == SOCKET_ERROR) {
        AfxMessageBox("WSAEnumNetworkEvents()");
        closesocket(*pSocket);
        WSACloseEvent(*hEvent);
        return -1;
    }

    if (events.lNetworkEvents & FD_CLOSE) {
        AfxMessageBox("closing...");
        closesocket(*pSocket);
        WSACloseEvent(*hEvent);
    }

    if (events.lNetworkEvents & FD_CONNECT) {
        if(events.iErrorCode[FD_CONNECT_BIT]!=0)
            return -1;

        //AfxMessageBox("connected");
        return 0;
    }
}
return 0;

There are 10 types of people in the world
Those who understand binary, and those who don't