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I am creating a server and a client apliction for sending/receiving files trough a CAsyncSocket derived class.But it seems that the server can't send all the file data troght the socket... I can't figure out why... here it is the code for sending the file on the server side :
void send_File(const CString &name)
{
CFile f;
unsigned char buffer[512];
int n;
f.Open(name,CFile::modeRead|CFile::shareDenyNone);
while ( (n = f.Read(buffer,512)) )
if (!PacketSend(*ClientSocket,buffer,n))
AfxMessageBox("Error sending packet...");
f.Close();
}
//code of PacketSend function
bool CConversarDlg::PacketSend(CMySocket &sock,void *buffer,const int &length)
{
//the "head" of each packet is an int, which tells the client how many bytes the packet has (packet length)
int total = sizeof(int) + length;
int sent;
int bufpos = 0;
BYTE *buf = new BYTE[sizeof(int) + length];
memcpy(buf,&length,sizeof(int));
memcpy((void *) (buf+sizeof(int)),buffer,length);
do
{
sent = sock.Send(buf+bufpos,total);
if ( sent == SOCKET_ERROR ) return false;
total -= sent;
bufpos += sent;
if ( total > 0 ) Sleep(20);
} while ( total > 0 );
delete [] buf;
return true;
}
Well, I always got the messagebox saying "error sending packet..." when I call the function send_file(const CString &); But this only occurs when a file is larger then a 5 kbytes. I can't figure out why.I am a beginner with sockets and tcp/ip.... Anyone could help? Thanks. 
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Hello, the codegurus around the world.;)
Even though I can't point out something wrong of your code, your code may
work if you send only one file within 512 characters.
You check if the first send(...) function successfully sends the data.
If not, try not to call send function at all.
At the same time, you had better check if CFile reads the exact buffer before
Send function is called by thread and CEvnet.
(This means that Socket send function may be called before CFile object
restore the 512 bytes data to the buffer?)
You can check these codes in Guncleus project (P2P application)
Go to my article, and try to go to Guncleus project web site, and download
the free code. And Check GnuUpload.h and GnuUpload.cpp, and you will find some
code of how to upload the files.
Please, don't send me your email about your questions directly.
Have a nice day!
Sonork - 100.10571:vcdeveloper 
-Masaaki Onishi-
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I would like to send an ASCII string out my serial port by pressing one of the buttons. I don't need it to effect anything else just the one specific string. A friend gave me an idea how to do it. I was wondering if everyone could take a look at my code and tell me what I need to change to complete it. I hope this makes sense what I said. I am new to Visual C++
const char * AsciiCmd = "GO";
CreateFile(AsciiCmd, GENERIC_READ |GENERIC_WRITE,
0, 0, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
WriteFile(AsciiCmd, GENERIC_READ //I don't know what to put in next or if this is even going to work.
thankyou for any help you can give.
Mavrock
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I'm stumped and need help. Why does my modeless property sheet show up right from the get go?
I have my property sheet stuff in CMainFrame (MainFrm.cpp/.h). I have a CPropertySheet derived class, CMySheet, and do the following in MainFrm.cpp:
m_pMySheet = new CMySheet("My Modeless Form", this, 0);
m_pMySheet->Create(this, -1, NULL);
I created a modeless property sheet and have overridden the CPropertySheet::OnInitDialog() operation as follows:
BOOL CMySheet::OnInitDialog()
{
// Setting of m_bModeless to FALSE and then TRUE is a trick from CodeGuru
m_bModeless = FALSE;
BOOL bResult = CPropertySheet::OnInitDialog();
m_bModeless = TRUE;
// The rest of my sheet's initialization - fields, controls, etc...
return bResult;
}
As soon as I run my executable, up pops my modeless property sheet. I don't want this to happen until my controlling dialog (dialog, menu item/menu bar) displays the property sheet.
Thanks in advance.
Johnny
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Ok, I think I found out by examining my m_pMySheet->Create() statement, Sorry for this original post.
Here is what I should have examined:
m_pMySheet->Create(this, -1, NULL)
with the second parameter -1, the Create() function employs the following style WS_VISIBLE | WS_SYSMENU | WS_POPUP | WS_CAPTION | DS_MODALFRAME
What I should do is explicitly define my window's (prop-sheet's) style to not have WS_VISIBLE.
See ya...
Johnny
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My debug is constantly screwing up royally.. if i trace a section of code it will jump from one line to a few down and just skip stuff.. the locals window doesnt show anything but 'this' and everything under that is a value that cant be evaluated..
its like my debug is debugging code that is no longer there .. it will go over statements and just do what it wants to almost.. then five minutes later it will mystically work even though i didnt change the part i was trying to debug at all..
i have tried to clean solution and rebuild all, but this does nothing to fix this problem.. anyone seen this before? stupid .net is a little buggy i feel..
-dz
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Hmm, make sure you don't have any optimizations turned on. Those'll screw up a debugging session nicely. And make sure you're using a program database for debugging information. (both of these settings are in project properties)
---
Shog9
If I could sleep forever, I could forget about everything...
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thanks a ton.. i turned on the optimizations a week ago.. didnt even think about the connection.. thanks a bunch!
any chance you know why i cant add a class to a dialog in the resource editor? it asks for the class name, the files, what its base is (CDialog).. i click ok and nothing happens.. never creates the .h or .cpp and gives no error.. cant add a class to any dialog..
at least i can do that manually, being able to debug again is a definate help, thanks a ton!
-dz
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i see this frequently on VC6. sometimes a rebuild all will fix it, sometimes i have to restart VC, sometimes i have to reboot.
sorry i don't have a better answer.
-c
Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten
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Have you tried a rebuild all? Sometimes this solves the problem.
"Hey man, Taliban, Tali me Banana."
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Hi
I have a strange problem I can't solve. At first a short explanation what I want to do:
I have written an MFC DLL. I added a sourcefile of an subclassed window. Now I want to call that window inside the DLL:
CSubWindow window;
window.Create(...)
...
(show the window)
Well, ok, the window shows up. But then the window itself starts a timer after that the window hides itself. It calls SetTimer(...) and hides itself in the OnTimer() procedure.
But for some reason SetTimer seems to fail so that the window can't hide itself after a period. Inside an EXE everything works, but inside the DLL all the timer thingies don't work anymore.
Of coure I could add a Sleep() command to hide the window after a period, but that's the worst solution I can think of since it stops the whole DLL.
Does anyone have a solution how to get the timers of an window get to work in a DLL?
thanks in advance
Greg
modified 12-Sep-18 21:01pm.
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Does anyone ever developed one ? Where can I find some tips about this ? I found some things on MSDN and PLATAFORM SDK but I need some debug tips and other stuff...
Mauricio Ritter - Brazil
Sonorking now: 100.13560 Trank
![Beer | [beer]](https://codeproject.freetls.fastly.net/script/Forums/Images/beer.gif) The alcohol is one of the greatest enemys of man, but a man who flee from his enemys is a coward.
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I have now tried doing my own double buffering but the flicker is still there!
In WM_PAINT I do this (it's suppose to be double buffering ):
memdc = ::CreateCompatibleDC(clientDC);
hBitmap = CreateCompatibleBitmap(clientDC, 200,200);
::SelectObject(memdc, hBitmap);
SetBkColor(memdc, RGB(0,0,0));
BitBlt(clientDC, 0,0,200,200,memdc,0,0,SRCCOPY);
ReleaseDC(g_hWnd, clientDC);
So... which step have I missed? Or what step have I missunderstod!
Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!
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hm.. I have figured it out now!
and I see now that I posted an incomplete code snippet of the code I had problem with too.....
Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!
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I setup a low level keyboard hook using SetWindowsHookEx(), and the hook proc. Everything works fine, but I dont know how to figure out what key was pressed.
Microsoft docs :
LRESULT CALLBACK LowLevelKeyboardProc(
int nCode, // hook code
WPARAM wParam, // message identifier
LPARAM lParam // message data
);
docs say this about lParam
lParam
[in] Pointer to a KBDLLHOOKSTRUCT structure.
here is the doc for kbdllhoststruct:
typedef struct tagKBDLLHOOKSTRUCT {
DWORD vkCode;
DWORD scanCode;
DWORD flags;
DWORD time;
ULONG_PTR dwExtraInfo;
} KBDLLHOOKSTRUCT, *PKBDLLHOOKSTRUCT;
HELP!! how do i get the vkCode??? (In the regular keyboard hook the code is stored in wParam, but now its buried)  
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you will get the Virtual Keycode frm the struct...
as u mentioned here..then wut is the problem..specify your problem clear.....
Renjith-CPian.
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The answer to your question is in your question!!!
lParam ... is a ... Pointer to a KBDLLHOOKSTRUCT structure.
so try this:-
KBDLLHOOKSTRUCT * pKbHk;
DWORD dwVkCode;
pKbHk = (KBDLLHOOKSTRUCT *) lParam;
dwVkCode = pKbHk->vkCode;
STL is a religeon. Enquiries to Reverend Christian Graus
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I'm having trouble getting my listbox to scroll automatically as new items are added to it. I've tried using the ScrollWindow method, but it doesn't seem to change anything. What I have now is the following:
void MyClass::updateNews( const char *news ) {
int max;
m_news.AddString( news );
max = m_news.GetScrollLimit( SB_VERT );
m_news.SetScrollPos( SB_VERT, max );
}
But it doesn't work quite right. It scroll most of the way down, but there are still a few lines still unshown.
Any help would be appreciated.
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Did you try CListBox::SetTopIndex?
Tomasz Sowinski -- http://www.shooltz.com
What is "scratch" and why can everything be made from it?
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Anybody know of some shareware/freeware to count the lines of code in a VC++ project?
Thanks
Aaron
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I use the one located here:
http://www.codeguru.com/devstudio_macros/LineCount.shtml
Chris Richardson
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Thanks!
I'll give it a shot.
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Hi.
I would like to know is it possible and how to create a submenu. For example, in CEditView, when the user right-click (depends on mouse orientation) Windows draws a submenu with options such as Copy, Paste, etc. I would like to know is there a way to create something like that for *anything* including any view or object using MFC and/or Win32 API.
Thanks,
Kuphryn
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Simply handle this code in your right mouseclick handler:
POINT point;
GetCursorPos(&point);
CMenu menu;
CMenu *submenu;
menu.LoadMenu(IDR_POPUP);
submenu = menu.GetSubMenu(0);
submenu->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON,point.x,point.y,GetActiveWindow(),NULL);
regards
modified 12-Sep-18 21:01pm.
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