C / C++ / MFC

14-Mar-06 4:04

Hi, I'm searching for a few days now for a tutorial of an example to see all the computers that are in my lan.
Does anybody has this for me?

Greetings,
Spike

David Crow14-Mar-06 4:23

14-Mar-06 4:23

Try NetServerEnum().

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

jspike14-Mar-06 4:40

14-Mar-06 4:40

I have this code, but it seems Visual Studio .Net has trouble with WNetOpenEnum, WNetEnumRecources and WNetCloseEnum.

	CString strTemp;<br />
	CListBox *pList = (CListBox*) GetDlgItem(IDC_LIST1);<br />
	pList->ResetContent();<br />
<br />
	struct hostent *host;	<br />
	struct in_addr *ptr;	// To retrieve the IP Address<br />
<br />
 	DWORD dwScope = RESOURCE_CONTEXT;<br />
	NETRESOURCE *NetResource = NULL;	<br />
	HANDLE hEnum;	<br />
	WNetOpenEnum( dwScope, NULL, NULL, NULL, &hEnum );	<br />
	<br />
	WSADATA wsaData;  <br />
	WSAStartup(MAKEWORD(1,1),&wsaData);<br />
<br />
	if ( hEnum )	<br />
	{<br />
		DWORD Count = 0xFFFFFFFF;<br />
		DWORD BufferSize = 2048;<br />
		LPVOID Buffer = new char[2048];<br />
		WNetEnumResource( hEnum, &Count, Buffer, &BufferSize );<br />
<br />
		NetResource = (NETRESOURCE*)Buffer;<br />
<br />
		char szHostName[200];<br />
<br />
		for ( unsigned int i = 0; i < BufferSize/sizeof(NETRESOURCE); i++, NetResource++ )<br />
		{	<br />
			if ( NetResource->dwUsage == RESOURCEUSAGE_CONTAINER && NetResource->dwType == RESOURCETYPE_ANY )<br />
			{<br />
				if ( NetResource->lpRemoteName )<br />
				{<br />
					CString strFullName = NetResource->lpRemoteName;<br />
					<br />
					if ( 0 == strFullName.Left(2).Compare("\\\\") )<br />
						strFullName = strFullName.Right(strFullName.GetLength()-2);<br />
<br />
					gethostname( szHostName, strlen( szHostName ) );<br />
					host = gethostbyname(strFullName);<br />
					ptr = (struct in_addr *) host->h_addr_list[0];<br />
<br />
					int a = ptr->S_un.S_un_b.s_b1;  // Eg. 211.40.35.76 split up like this.<br />
					int b = ptr->S_un.S_un_b.s_b2;  //     40<br />
					int c = ptr->S_un.S_un_b.s_b3;  //     35<br />
					int d = ptr->S_un.S_un_b.s_b4;  //     76<br />
<br />
					strTemp.Format("%s -->  %d.%d.%d.%d",strFullName,a,b,c,d);<br />
					pList->AddString(strTemp);<br />
				}<br />
			}<br />
		}<br />
		delete Buffer;<br />
		WNetCloseEnum( hEnum );<br />
	}<br />
	WSACleanup();

David Crow14-Mar-06 5:35

14-Mar-06 5:35

This is code I've used successfully in the past:

WSADATA       wsaData;
DWORD         dwResult,
              dwCount = 0xffffffff,
              dwBufferSize = 16384;
HANDLE        hEnum;
LPVOID        lpBuffer;
LPNETRESOURCE lpNetResource = NULL; 
 
dwResult = WSAStartup(MAKEWORD(1, 1), &wsaData);
if (0 == dwResult)
{
    dwResult = WNetOpenEnum(RESOURCE_CONTEXT, RESOURCETYPE_ANY, NULL, NULL, &hEnum);
    if (NO_ERROR == dwResult && NULL != hEnum)
    {
        lpBuffer = new BYTE[dwBufferSize];
 
        dwResult = WNetEnumResource(hEnum, &dwCount, lpBuffer, &dwBufferSize);
        if (NO_ERROR == dwResult && dwCount > 0)
        {
            lpNetResource = (LPNETRESOURCE) lpBuffer; 

            while (NULL != lpNetResource)
            {
                ...
                lpNetResource++;
            }
        }
 
        delete [] lpBuffer;
    }
 
    dwResult = WSACleanup();
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

jspike14-Mar-06 8:18

14-Mar-06 8:18

Thanks for the code, but again thesame. I get these errors:

NetSender error LNK2019: unresolved external symbol _WNetEnumResourceA@16 referenced in function "public: void __thiscall CNetSenderDlg::View(void)" (?View@CNetSenderDlg@@QAEXXZ)

NetSender error LNK2019: unresolved external symbol _WNetOpenEnumA@20 referenced in function "public: void __thiscall CNetSenderDlg::View(void)" (?View@CNetSenderDlg@@QAEXXZ)

NetSender fatal error LNK1120: 2 unresolved externals

ThatsAlok14-Mar-06 18:28

ThatsAlok

14-Mar-06 18:28

jspike wrote:
Thanks for the code, but again thesame. I get these errors:

please include this line in your cpp file

#pragma comment(lib,_T("Mpr.lib"))

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

jspike14-Mar-06 20:18

14-Mar-06 20:18

It works, thank you Big Grin | :-D

wchat_t to normal char

RichardS14-Mar-06 4:00

RichardS

14-Mar-06 4:00

Hi All,

I have an utility programme that uses wchar_t. However interfacing to our programme which uses char's is a problem.

How does one convert to wchar_t to char, and visa versa?

regards,
Rich

"Programming today is a race between software engineers striving to build bigger and
better idiot-proof programs, and the Universe trying to produce bigger and better idiots.
So far the Universe is winning." -- Rich Cook

Michael Dunn14-Mar-06 8:39

Michael Dunn

14-Mar-06 8:39

???

--Mike--
Visual C++ MVP Cool | :cool:

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David Crow14-Mar-06 4:26

14-Mar-06 4:26

Check out the W2A() and A2W() macros.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Nemanja Trifunovic14-Mar-06 6:52

Nemanja Trifunovic

14-Mar-06 6:52

RichardS wrote:
How does one convert to wchar_t to char

WideCharToMultiByte[^]

RichardS wrote:
and visa versa

MultiByteToWideChar[^]

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

how to Acesss Remote Database through Internet

ThatsAlok14-Mar-06 18:29

ThatsAlok

14-Mar-06 18:29

wctomb and mbtowc

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

J512198214-Mar-06 3:38

J5121982

14-Mar-06 3:38

i have my database in 61.247.251.97(My system)
how to Acesss Remote Database through Internet
I use the ADO for connecting the database.

I use the following connection string:

_bstr_t m_Conn("PROVIDER=SQLOLEDB.1;Server=61.247.251.97;Database=IstEncoder;uid=sa;pwd=sa;");

JAYARAJ

-- modified at 23:28 Tuesday 21st March, 2006

Setting color of text with printf()

jerry1211a14-Mar-06 3:22

jerry1211a

14-Mar-06 3:22

Hello.

I am setting up a C console application under VS.net. I have various printf statements. If some type of error condition occurs I would like to change the color of the text to RED that the printf statement prints to the console.

I dont know how to change the colors for this situation.
Can someone help me with this?

Frown | :(

Jerry

Re: Setting color of text with printf()

David Crow14-Mar-06 4:28

Re: Setting color of text with printf()

14-Mar-06 4:28

printf() knows nothing of color. Check out SetConsoleTextAttribute() and WriteConsole() instead.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

jerry1211a14-Mar-06 5:31

jerry1211a

14-Mar-06 5:31

Ok thanks, I got it all working.

Smile | :)

Jerry

Express Edition 2005 and VC++6

thierrypp14-Mar-06 2:56

thierrypp

14-Mar-06 2:56

Hi every body,

Do you know if I want to keep both Express Edition 2005 and VC++6

then mybe the best way would be:

--name VC++6.0 cpp files with notepad

-- and then, ? does the VC++ Express Edition 2005 gives a different extension for cpp files?

==> then both plateforms can be used separately with no problems?

Thanks for any feedback!

Regards

Cedric Moonen14-Mar-06 3:01

Cedric Moonen

14-Mar-06 3:01

The project files are different: VC6 uses dsw and dsp files and VC Express uses vcproj files (I think). So, you can use two different projects with the same source files.

thierrypp14-Mar-06 3:10

thierrypp

14-Mar-06 3:10

well in fact no,

I tried yesterday but all the cpp files from VC6 projects where automatically renamed with Expres Edition logo and no way to recover my projects in VC++ 6....Until I unintalled Express edition 2005.

But..... if you mangage *.cpp files, how to keep them? in notepad? wordpad?
or just used developper VC++6.0?

Same question with Express Edition 2005?

thanks a lot.

Cedric Moonen14-Mar-06 3:16

Cedric Moonen

14-Mar-06 3:16

.cpp and .h files are just plain text files (only the extension changes). So, you can still use them in VC6 even you install VC Express. What can happen is that you change things in the file and these changes are not supported by the VC6 compiler.

thierrypp wrote:
no way to recover my projects in VC++ 6

Don't convert your project. Instead create a new project and add the files manually. This way you will keep your VC6 project intact and you can still work on it.

toxcct14-Mar-06 3:16

toxcct

14-Mar-06 3:16

tss, you are confusing between extension and explorer registered program to use this type of file. simply right click on the workspace file, ,select "open with..." and choose "developer studio" (visual studio 6).

to change the icons, open an explorer, select Tools > Folder Options... > File types tab...
there, reach the type you waznt to modify and click "Advanced" button.