C / C++ / MFC

15-Aug-06 4:20

Hi Everyone, i am still having troule with this over a wan... can anyone shed any light on it for me ?? i am getting kinda desperate now !!

CFtpConnection Thread......

Thanks in advance

Lee

includeh1015-Aug-06 6:49

includeh10

15-Aug-06 6:49

try to find sample programs in VC disks (MSDN).
FTP is very easy.

racing5715-Aug-06 10:50

15-Aug-06 10:50

i have done... and the way i have written it works on the local network, but i have a router set up with 3-5 pcs on it and am using port forwarding, if i leave the ftp port at 21 it works fine, if i change the port to anything else i can connect and create folders etc, but cannot do file searches or transfer files... i need to have it on different port as i have upto 5 pcs to forward to...

please help....

thangnvhl15-Aug-06 21:53

thangnvhl

15-Aug-06 21:53

Open your MSDN -> choose Index tab -> Type: FTP Sessions -> Enter

Sincerely
Thangnvhl

racing5715-Aug-06 23:00

15-Aug-06 23:00

my problem isnt how to use msdn, as i have been programming for 6+ years.. and have used it a fair amount in that time... i have downloaded some sameple programs from this site and they all have the same problem....

Justin Tay16-Aug-06 2:23

Justin Tay

16-Aug-06 2:23

are you forwarding your data port as well?

racing5716-Aug-06 3:46

16-Aug-06 3:46

i dont know what port the data port is... can i set this up ?? if i use port 21 it works ok...

Justin Tay16-Aug-06 22:01

Justin Tay

16-Aug-06 22:01

Here[^] is a decent explanation.

timers without windows

m.dietz15-Aug-06 4:09

m.dietz

15-Aug-06 4:09

Hi,

In a current project I need a class that monitors some maintenance data and regularly writes them to a log file. As this class is used in different modules in different ways, the functions should be encapsulated as best as possible and the usual way of using this class should be by giving a filename to the constructor to configure the instance and then calling Collect() to immediately collect and log the data or calling EnableTimer(time_span) to regularly log the data to the log file every time_span milliseconds.

The problem I can't solve is the timer. My first approach was

<br />
<br />
BOOL CMaintMonitor::EnableTimer(UINT interval)<br />
{<br />
    if(bl_TimerEnabled) StopTimer();<br />
    bl_TimerEnabled = TRUE;<br />
    ui_TimerInterval = interval;<br />
    TimerID = SetTimer(NULL, 0, interval, TimerFunction);<br />
    if(!TimerID)<br />
    {<br />
        bl_TimerEnabled = FALSE;<br />
        ui_TimerInterval = 0;<br />
        return FALSE;<br />
    }<br />
    return TRUE;<br />
}<br />
<br />
...<br />
<br />
BOOL CMaintMonitor::StopTimer()<br />
{<br />
    if(bl_TimerEnabled)<br />
    {<br />
        bl_TimerEnabled = FALSE;<br />
        ui_TimerInterval = 0;<br />
        KillTimer(TimerID);<br />
    }<br />
    return TRUE;<br />
}<br />

TimerFunction was thought as a private method of CMaintMonitor that calls Collect(). Visual C++ didn't like this approach, telling me that it couldn't convert parameter 4 of SetTimer from void(...) to void(__stdcall *)(...). Reading the help pages again I saw that this function is meant to send a WM_TIMER message to a window whose message processing function should call the provided function instead of standard functions, so it still needs a WM_TIMER message processing even if the window handle provided is NULL Confused | :confused:

.

The problem now is that I can't call a global function (I think this is what the compiler wants to say with the (__stdcall *) part of the error message) as Collect is a member function of an instance of CMaintMonitor using instance member data to do its work. So even if I found a way to use a global function for that timer event, I still need a way to give a pointer to my CMaintMonitor instance to that function for the call to Collect(), but I don't see a way to do so.

Can anyone help me solving the problem with that timer? This class should come without a user-Interface, so there is no window I can abuse to handle the timer event, and I can't even use the window of a caller as there are a lot of modules which come without UI either but still need to to use my monitor class. I'm new to programming under Windows, so I don't know if there might be an easy workaround for this problem I just don't know.

Thanks in advance
Martin Dietz

led mike15-Aug-06 4:26

led mike

15-Aug-06 4:26

Take a look at the Win32 Timer Queue API[^]

led mike

Re: timers without windows [modified]

m.dietz15-Aug-06 5:07

m.dietz

15-Aug-06 5:07

This looks interesting, but I can't find it in my helppages and my compiler doesn't find it neither although I included windows.h (as said in the MSDN article), is it available in Visual C++ 6.0 (sorry I forgot to mention that I'm pinned to that compiler)?

Greetings
Martin

led mike15-Aug-06 5:53

led mike

15-Aug-06 5:53

I was using it with VC6 a few years ago. You need to download the latest SDK from MSDN and make sure to include the header and library file paths in the IDE setup.

[modified] That is "Platform SDK" sorry

led mike

Last modified: Tuesday, August 15, 2006 10:50:44 AM -- Platform SDK

m.dietz15-Aug-06 20:24

m.dietz

15-Aug-06 20:24

Sorry, but if I have to download something I'm not sure other developers in my company have installed, it's useless. I can't bring up a solution that can only be compiled on my computer. Sniff | :^)

Thanks anyway, I'll try if I can make sense of the Multimedia Timers cje mentioned
Martin

led mike16-Aug-06 5:05

led mike

16-Aug-06 5:05

m.dietz wrote:
I'm new to programming under Windows

The Windows Platform SDK is a standard part of the operating system and any development environment. You should not be developing without it. You might want to do some reading about things life safe strings etc.

led mike

Getting IP of a Network group PC

cje15-Aug-06 4:26

cje

15-Aug-06 4:26

could you use using multi-media timers? There are articles here on code project that talk about them. I use a class that wraps the multimedia timer that I inherit from (MMTimer) that allows me to get an Update callback when the timer fires.

cje

Singleton problem !!!

Bratu Aurelian15-Aug-06 4:05

Bratu Aurelian

15-Aug-06 4:05

Hello!

I've implemented a singleton class and i discovered that in every .dll that i accessed a instance of the singleton a new instance is created. So, in every dll i have a different instance. My question is :How can I have a single instance of the singleton between multiple dll ?

This is my implementation:

class cSingleton
{
private:
static cSingleton* m_instance;

cSingleton(){};
~cSingleton(){};

public:
static cSingleton& Instance();
};

cSingleton& cSingleton::Instance()
{
if(m_instance == NULL)
{
m_instance = new cSingleton;
}
return *m_instance;
};

Thanks!

-- modified at 3:33 Thursday 17th August, 2006

Kharfax15-Aug-06 4:03

Kharfax

15-Aug-06 4:03

Hi people

How can I get the IP of a machine in my workgroup?
I get a list of connected PCs in the workgroup using NetServerEnum, so I have the computer Name

Thanks in advance

David Crow15-Aug-06 4:09

David Crow

15-Aug-06 4:09

Kharfax wrote:
How can I get the IP of a machine in my workgroup?

Use gethostbyname().

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Kharfax15-Aug-06 4:11

Kharfax

15-Aug-06 4:11

Fantastic, thanks a lot David, that was a quick answer Big Grin | :-D

A_Fa15-Aug-06 19:45

A_Fa

15-Aug-06 19:45

void GetLocalIPAddress(char *ipAddress)
{
#define MAX_NAME_LEN 65

WSADATA wsaData;
if ( WSAStartup( MAKEWORD( 2, 2 ), &wsaData ) == 0 )
{
char HostName[MAX_NAME_LEN];
struct in_addr *ptr;

gethostname (HostName,MAX_NAME_LEN);

hostent *host = gethostbyname(HostName);

if(host == NULL)
{
ipAddress = NULL ;
WSACleanup( );
return ;
}

ptr = (struct in_addr *)host->h_addr_list[0];

CString str;
str.Format("%d.%d.%d.%d",
ptr->S_un.S_un_b.s_b1,
ptr->S_un.S_un_b.s_b2,
ptr->S_un.S_un_b.s_b3,
ptr->S_un.S_un_b.s_b4);
strcpy(ipAddress,(char*)str.GetString());
}

WSACleanup( );
}