C / C++ / MFC

30-Aug-03 13:38

How can I open an excel file to view it using C++ from my application? I tried spawn and it doesn't seem to work... help please!

Re: open an excel file?

Ravi Bhavnani30-Aug-03 14:23

Ravi Bhavnani

30-Aug-03 14:23

CString strExcelFile = "MyFile.xls";
long nStatus = (long) ::ShellExecute (m_hWnd, "open", strExcelFile, NULL, "", SW_SHOWNORMAL);
if (nStatus <= 32)
   error();

/ravi

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Re: open an excel file?

Anonymous30-Aug-03 16:51

30-Aug-03 16:51

thanks, this is getting me closer! i quickly saw excel flash before my eyes before getting the error 1419904.. any ideas?

Re: open an excel file?

Anonymous30-Aug-03 17:02

Re: Does WinSock ever work?

30-Aug-03 17:02

forget the error, that was something else, this works, thank you so much!!!!!!!

Does WinSock ever work?

Steven M Hunt30-Aug-03 10:50

Steven M Hunt

30-Aug-03 10:50

Hi! I have visited so many WinSock tutorials to find source code that works, but it never does! All i want to do is to get 2 computers on my network to exchange data! That's it! From what i've read about WinSock, it should be able to do that without any problems. I either can't get it to compile, or it refuses to communicate to any other computers outside my own. I just don't get it! Are there any tutorials or source code that actually works? An MFC tutorial would be OK too.

-- Steve

Matt Newman30-Aug-03 10:57

Re: Does WinSock ever work?

30-Aug-03 10:57

Do you read the full article or just download the source code. There are plenty of winsock example on CP that work, but sometimes you have to read the article so you know what to trouble shoot

^Matt Newman
Sonork: 100:11179

"Whoa, that ruled! What function key do I gotta press to get that to happen again?" - Strong Bad

S^nyp30-Aug-03 15:25

S^nyp

30-Aug-03 15:25

VERY TRUE.

<marquee>Universal Project

AcceptEx() and Error 10022 :: Winsock

valikac30-Aug-03 10:32

valikac

30-Aug-03 10:32

Hi,

I've been trying to implement a simple server using AcceptEx(). However, no matter how I create the listening socket, AcceptEx() always returns 0 with error code 10022.

10022 -> An invalid argument was supplied.

Here is a quick example.

-----
SOCKET listeningSocket = ::WSASocket(AF_INET, SOCK_STREAM,
IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED);
u_long host;
::WSAHtonl(listeningSocket, INADDR_ANY, &host);
SOCKADDR_STORAGE listenAddr;
SOCKADDR_IN *pListenAddrIN = reinterpret_cast<sockaddr_in
*="">(&listenAddr);
pListenAddrIN->sin_addr.s_addr = host;
pListenAddrIN->sin_family = AF_INET;
u_short port = 0;
::WSAHtons(listeningSocket, static_cast<u_short>
(21), &port);
pListenAddrIN->sin_port = port;
::bind(listeningSocket, reinterpret_cast<sockaddr *="">
(&listenAddr), sizeof(SOCKADDR));
::listen(listeningSocket, 2);

// AcceptEx()

SOCKET acceptSocket = ::WSASocket(AF_INET, SOCK_STREAM,
IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED);
WSAOVERLAPPED ol;
memset(&ol, 0, sizeof(WSAOVERLAPPED));
char buffer[4096];
unsigned int nSASize = sizeof(SOCKADDR_STORAGE);
::AcceptEx(listeningSocket, activeSocket, buffer,
4096 - ((nSASize + 16) * 2), nSASize + 16, nSASize + 16,
&nReturn, &ol);
DWORD error = ::WSAGetLastError();
-----

In the example above, the call to AcceptEx() returns
error 10022.

Please post if you see what the problem might be.

Thanks,
Kuphryn

Progmatically Change IP

Matt Newman30-Aug-03 9:21

30-Aug-03 9:21

Is it possible to progmatically change the IP address of a specified network adapter. I'd like to avoid changing registry settings. Also is it possible to switch from DHCP to Static?

^Matt Newman
Sonork: 100:11179

"Whoa, that ruled! What function key do I gotta press to get that to happen again?" - Strong Bad

S^nyp30-Aug-03 9:30

S^nyp

30-Aug-03 9:30

Ehem I don't know a whole lot about TCP/IP programming but I 'think' that you can't change it and probably that may be the truest thing but are there any other 'opinions' out there?? And anyways why would you want to change the IP... suspicious Suspicious | :suss:

wink;)

<marquee>Universal Project

Matt Newman30-Aug-03 9:34

30-Aug-03 9:34

snyp wrote:
And anyways why would you want to change the IP

Because this computer is used on 2 different networks that use different IP ranges.

^Matt Newman
Sonork: 100:11179

"Whoa, that ruled! What function key do I gotta press to get that to happen again?" - Strong Bad

S^nyp30-Aug-03 9:39

S^nyp

30-Aug-03 9:39

I guess you cannot change it progmatically. Maybe someone else would explain it better to you cause I'm not the most knowledgable person out there in the network thing. (getting into databases right now and probably later into networks) Laugh | :laugh:

<marquee>Universal Project

Scozturk30-Aug-03 21:29

Scozturk

30-Aug-03 21:29

I don't think it is possible when you are already connected... You must first disconnect then change the address or it may cause some problems because one machine address can't have 2 IP addresses at the same time. (I don't know how to change it even if you disconnect... but I think you must disconnect first!)

Well... I am a beginner ...

ZoogieZork30-Aug-03 19:26

ZoogieZork

30-Aug-03 19:26

This is the closest I could find on the subject (using netsh to change the interface parameters):
MSKB #257748[^]

I've never used netsh personally, but it seems like the easiest way to go.

- Mike

Matt Newman3-Sep-03 13:52

3-Sep-03 13:52

Thanks for the input, I'm sorry I didn't respond sooner. I have been feeling really lazy lately and haven't gotten around to working on it

^Matt Newman
Sonork: 100:11179

"Battleship, was the first game that taught you to lie" - Zachery

Scozturk30-Aug-03 21:36

Scozturk

30-Aug-03 21:36

Hi again!
I found a way but as I mentiones before you will have to reboot each time you change it. ( it is registry stuff)

http://www.codeguru.com/network/change_ip.shtml

I hope this will help!

Well... I am a beginner ...

Matt Newman3-Sep-03 13:56

How can i register an event in windows??

3-Sep-03 13:56

Thanks for the input. As I said in my response to Michael I have been really lazy lately and haven't gotten around to using it yet.

^Matt Newman
Sonork: 100:11179

"Battleship, was the first game that taught you to lie" - Zachery

Meysam Khayatan30-Aug-03 9:03

Meysam Khayatan

30-Aug-03 9:03

How can i register an event in windows .
for example my program with pressing enter do something
and i want my program without focus do this action.
even if be in other program.

MkhProgrammer

CWinThread exits when calling recvfrom

CND30-Aug-03 6:46

CND

30-Aug-03 6:46

Hi,
I'm using a CWinThread to send and recieve ICMP packets (pings).
but while recieving the echo replys the thread exits.
Thats the code I'm calling:

<br />
	char* echoReply = new char[50];<br />
	int nRet;<br />
	int nAddrLen = sizeof(struct sockaddr_in);<br />
	sockaddr_in lpsaFrom;<br />
	lpsaFrom.sin_family = AF_INET;<br />
	lpsaFrom.sin_port = 0;<br />
	lpsaFrom.sin_addr.s_addr = inet_addr("192.168.6.100");<br />
<br />
	// Recieve the echo reply<br />
	nRet = recvfrom(s,<br />
					echoReply,<br />
					sizeof(echoReply),<br />
					0,<br />
					(sockaddr*) &lpsaFrom,<br />
					&nAddrLen);<br />

when calling recvfrom() the thread breaks down. even the debugger does not stop at any breakpoints i have set after the recvfrom call.

has anybody an idea?

PS: recv also doesn't work and bind works fine...

Re: CWinThread exits when calling recvfrom

Ryan Binns30-Aug-03 22:55

Ryan Binns

30-Aug-03 22:55

This may not fix the problem but...

sizeof(echoReply) will return 4 (the size of the pointer), not 50. You need to specify 50 instead of sizeof(echoReply).

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

I purchased Visual C++ .net Standard Version 2003...

Anonymous30-Aug-03 6:29