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Thanx for showing interest.
By 'blocking' a packet I mean that I want certain packets not to reach their destination. Actually I mean to say is that I want to make an application which would let only those packets to pass which are allowed by me and block or discard those packets which are not allowed by me to further pass on.(i.e some thing like a firewall ). I am interested in using WINSOCK2 lib. Plz dont refer me to work on driver.
E.g Lets say I want that TCP packet should not reach their destinatin but ICMP packets should e.t.c.
Reply me soon
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AFAIK, there is no way how to do it with winsock (without developing a driver).
If you are allowed to use only W2K Server and W.NET Server there is a possibility to use the packet filtering in Routing and Remote Access Service.
For XP(Home+Professional) only, you can use Internet Connection Sharing/Firewall.
Other way is - go driver way - but you don't need to develop your own driver - I think, there are some drivers available on internet also with src code, where they have DLL with exported functions for configuring the filters. I know one personally, the name is something like pcaplib or similar, you have to look for windows version of course.
another links I found while 1 minute googling:
www.pcausa.com
http://www.ntkernel.com/products/winpkfilter.shtml
...
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I got an message saying that module User.exe in Frame caused an General protection falut at 0007:0000b35e.How to debug this problem.This ocured once in Win2000 and once in WinNT
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Hi,
how can I get all the user names and machine numbers those are in a domain by selecting the domain names??can anybody give me some sample code?thanks in advance....
BR
Thomas
ThomasKennedyBose
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Hi,
I have an exe being launching from a service using CreateProcess() call. As you know that the service is run in SYSTEM' (Default User') context and not in logged user' context. In my .exe, I have File Save option. When the FIle Save dialog comes up, it shows the desktop of the Default User and not of the user who has logged in. I want the File Save dialog to come up with the logged on User' profile (Desktop, My Documents, History, etc). Has anybody faced this problem earlier?
Please let me know if you have faced this problem before and if you have solved the defect or if you have a workaround for this.
Thanks.
Praveen
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thanks for the quick reply. But the problem here is that I do not have know who has logged in and what is his password. For CreateProcessWithLogonW, we need the username and the password. I thought of using CreateProcessAsUser. But there also I do not know how to get the token that represents the user. If you could help me in giving some piece of code, I would be greatful.
Thanks again!
Praveen
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I want to convert a text file, which is encoded in Unicode, into a Ascii one. The text is a mixture of Chinese characters and English. How can I do that?
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Use the API function WideCharToMultiByte() which is well documented on MSDN. It also depends if you want to convert to ascii (and hence lose all Chinese characters) or to an ansi code page that still allows the chinese characters to be retrieved (a multi-byte character set). If you want to go to ascii, you can use 1252 as the target codepage.
If you are running this on a Chinese system (i.e. Chinese Windows, or English Windows with Chinese regional settings), then you can pass in CP_ACP as the target code page, and it will convert it to the current system codepage, which should include the chinese characters. If this is not a chinese system, then you will need to pass in the chinese code page number instead (which i can't remember of the top of my head).
Dave
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 I have a tree control class. I also have an image list that I want to associate with my tree. Why can't I declare a static array and initialize it with the id's of icons, in the resource file, in my tree control class?? 
I've included "resource.h" so I should know what the IDI's are...
class RCanalTree : public CTreeCtrl<br />
{<br />
public:<br />
RCanalTree(CCanalManager *pCanalManager=NULL);<br />
<br />
public:<br />
const CCanalManager* GetCanalManagerPointer() { return m_pCanalManager; }<br />
bool SetCanalManagerPointer(CCanalManager *pCanalManager);<br />
<br />
public:<br />
static int m_icons[]={ <br />
IDI_ICON_SYSTEM, <br />
IDI_ICON_CANAL, <br />
IDI_ICON_SITE, <br />
IDI_ICON_WELL, <br />
IDI_ICON_TURNOUT, <br />
IDI_ICON_PUMP, <br />
0
};<br />
virtual void Populate();<br />
int DeleteChildren(HTREEITEM hParent);<br />
<br />
HTREEITEM GetDepthNextItem(HTREEITEM hItem);<br />
HTREEITEM FindItem(const char *name, int dwData);<br />
HTREEITEM InsertChildItem(const char *name, int dImage, HTREEITEM hParent, DWORD data, int iCheck=-1, bool bCondition=true);<br />
<br />
<br />
public:<br />
bool InitializeImageList();<br />
<br />
int GetImageIndexFor(int idOfIcon);<br />
bool DeleteChildItem(HTREEITEM hParent, const char* name, DWORD data);<br />
virtual void UpdateImages();<br />
virtual EnumForOnCheck OnCheck(HTREEITEM hItem, bool bNowChecked);<br />
int GetIconIndex(int idOfIcon);<br />
virtual ~RCanalTree();<br />
<br />
protected:<br />
bool IsScheduleLocked();<br />
CCanalManager* m_pCanalManager;<br />
CImageList *pImageList;<br />
<br />
<br />
<br />
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);<br />
<br />
DECLARE_MESSAGE_MAP()<br />
};
baaaah!
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Read up on how to use static member variables. Initialize it outside of the declaration like this:
class RCanalTree : public CTreeCtrl
{
...
static int m_icons[];
...
};
...
int RCanalTree::m_icons[]={
IDI_ICON_SYSTEM,
IDI_ICON_CANAL,
IDI_ICON_SITE,
IDI_ICON_WELL,
IDI_ICON_TURNOUT,
IDI_ICON_PUMP,
0
};
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dear all,
i want to display some dynamic information when my mouse point to some place in the dialog box.
does anyone know how to popup a yellow box to display such information? i am not talking about CMenu. but, i want a yellow box. how can i do that in MFC or any other third parties method?
thanks,
jim
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Something like this[^] maybe?
Mike Mullikin ![Beer | [beer]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/beer.gif)
Times change, politicians don't. - Anna-Jayne Metcalfe - Soapbox 10/03/2003
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I have a CEdit controll(with styles ES_MULTILINE | WS_VSCROLL) which has many lines of text in it, how can I scroll it to the bottom-most line? Thanks.
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With this call: pMyEdit->SetSel (INT_MAX, INT_MAX).
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my problem is like this,
1. when the user choose a menu item from the menu, a dialog box will be pop up
2. the dialog box contains some edit box which let the user input the value
3. after user input the value and click on the "view output" button, the dialog box will link to another window to show its output(diff input will have diff output)
i am now having problem on link the dialog box to another window which is going to show the output...
since i m new to mfc, can anyone helps me on that?? thanks..
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Hi,
I want to custom draw a tree. The DrawItem only works for clistbox, clistctrl, buttons... Is there any method I can use for CTreeCtrl?
Thanks
-----
We are what we repeatedly do. Excellence, then, is not an act, but a habit.
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Florin Ochiana wrote:
I want to custom draw a tree. The DrawItem only works for clistbox, clistctrl, buttons... Is there any method I can use for CTreeCtrl?
Have you looked at NM_CUSTOMDRAW. This may let you do what you want.
Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program
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 This should be a simple one for everyone:
I have written a simple client server app to read in a string and send it across. I have implemented this with standard CSockets but want to port it in a simple manner to use CAsyncSockets. I am not familiar with the sequence of events that occur with these-I only know how the CSockets work:
Client<br />
create<br />
connect(IP,Port)<br />
CArchive.write(...)<br />
<br />
Server<br />
create(Port)<br />
listen<br />
CArchive.read(...)<br />
I know that the asyncs. don't use archives and that the read and write mechanisms are different; but the more serious problem that I have is that I have no idea how things are meant to be ordered. I have read a lot about overloading member functions and the like but am thoroughly confused. Anyone able to offer some hints? I have read and tried to disassemble the code for the AsyncProxySocket example that's on here somewhere and ended up bashing my head against the wall.
There doesn't seem to be a great deal in the msdn about them. 
Thanks in advance
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Hi,
Read this: http://www.codeproject.com/internet/winsockintro01.asp
And check into the Internet Section. There are other articles related to your problem.
-----
We are what we repeatedly do. Excellence, then, is not an act, but a habit.
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I suggest taking a look into existing source code using CAsyncSocket ( e.g. older Gnucleus code).
The client side is pretty less work, but the server side has to take care about incoming socket and e.g. cleaning up socket objects when they die.
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Thanks for taking the time to reply. I have attempted to go through some of the other code that uses the Async sockets, but I can't seem to follow what's going on. If I want to use them, I need to be able to override the OnAccept() and OnSend() etc. member functions; but when are these called?
If I define my own class derived from CAsyncSocket and override the member functions, what is the order of events that must occur for these functions to work?
<br />
class Mysocket : public CAsyncSocket<br />
{<br />
public:<br />
virtual void OnAccept(int nErrorCode);<br />
virtual void OnClose(int nErrorCode);<br />
}<br />
<br />
Mysocket::OnAccept(int nErrorCode)<br />
{
SleepEx(1000,FALSE);
CAsyncSocket::OnAccept(nErrorCode);<br />
}<br />
Say for instance that I have a function in an mfc document class that is meant to do the job of recieving, its code currently looks like this: (this code is what I have ported from a CSocket version which is why it looks a little funny)
<br />
int CAsyncItDoc::RecieveStuff()<br />
{<br />
int status =0;<br />
Mysocket Myskt;<br />
char theString[4096];<br />
if(Myskt.Create(5001) == 0)
{<br />
status = Myskt.GetLastError();<br />
return status;<br />
}<br />
if(Myskt.Listen() == 0)
{<br />
status = Myskt.GetLastError();<br />
return status;<br />
}<br />
Mysocket theRec;
if(Myskt.Accept(theRec) == 0)
{<br />
status = Myskt.GetLastError();<br />
return status;<br />
}<br />
ofstream outfile;<br />
outfile.open("igotthis.txt");<br />
while (theReciever.Receive(theString,4096) != 0)<br />
{<br />
outfile << theString <<endl;<br />
status++;<br />
}<br />
outfile.close();<br />
Myskt.Close();<br />
return status;<br />
}<br />
I realise this sounds awfully lazy but some of the other code uses CDialogs which I've never used, and all the overridden member functions end up really long and complex. All I'm after is a simple implementation and at the moment all I have is a good way of getting confused.
Thanks for any (further) advice. 
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Yes, you basically will override a few member functions. Remember, asynchronous sockets will not be polled or go into blocking mode... instead you get an event when something interesting happens and can handle it. For example OnConnect() will be called after a succesfull or failed Connect() call, have a look on examples.
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