C / C++ / MFC

Re: can we apply socket program to parent and child

18-Jun-06 23:06

sorry to say that the properties of the second dialog is not child it is pop up .is ur code is applicable to this one also,
sree

see me18-Jun-06 23:22

see me

18-Jun-06 23:22

I thing this will work in ur case also.

ajeesh

Re: can we apply socket program to parent and child

happy_ram19-Jun-06 0:34

Resume the File transfer using sockets

19-Jun-06 0:34

i keep it mouse move under some condition like for some point call fuction.with i call Domodal iam not getting any errors but at the runtime i got abort,ignore window,afte execution again i geeting abort,ignore dialog.after clicking 5 times ignore my progarm is exiting.this due to that fuction.
please help me,

zahid_ash18-Jun-06 21:51

zahid_ash

18-Jun-06 21:51

HI,

I have build a Client/Server application that transfer a file using Sockets (CSocket class).

Some times with the disconnection of network connection, ful file transfer is not being done.
I want to transfer the file next time form the same position where it was stoped.

any idea / link thant how it can be done.

thanks

Regards.

Re: Resume the File transfer using sockets

_AnsHUMAN_ 18-Jun-06 21:59

_AnsHUMAN_

18-Jun-06 21:59

May be this is what you need :
See here[^]

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

It should be with out FTP involvment - Resume the File transfer using sockets

zahid_ash18-Jun-06 22:02

zahid_ash

18-Jun-06 22:02

thanks

But its using FTP command, I have build my own server and client that is not using FTP protocol.
Could you please help me in that direction (not FTP involvment) - thanks

Regards.

Re: It should be with out FTP involvment - Resume the File transfer using sockets

Laxman Auti18-Jun-06 22:31

Laxman Auti

18-Jun-06 22:31

zahid_ash wrote:
But its using FTP command, I have build my own server and client that is not using FTP protocol.
Could you please help me in that direction (not FTP involvment) - thanks

You have to send back acknowledge from client....make a log of acknowledgement's sent by the client ...and vice versa...and when crash occurs just read the log and do appropriate.

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

how to display avi file in VC?

dinyxu18-Jun-06 21:51

dinyxu

18-Jun-06 21:51

I want to paly avi file in real time.Meanwhile, I want to get each frame from the avi file then process it. If I don't use DirectShow, would you like give me some methods to realize it? I consulted msdn about AVIStream, but I didn't find any help from it.
Thanks in advance.

dinyxu

Re: how to display avi file in VC?

Viorel.18-Jun-06 22:29

Viorel.

18-Jun-06 22:29

If you just need to display an AVI file without processing, you can use an animation control and macros such as Animate_Open and Anumate_Play. In MFC, you can use CAnimateCtrl control.

If you need to extract frames, you probably have to use AVIStreamGetFrame function.

There is an article which can guide you: http://www.codeproject.com/audio/ExtractAVIFrames.asp[^].

Help me to use windows hook exactly.

marcoslav18-Jun-06 21:35

marcoslav

18-Jun-06 21:35

Purpose of my program is to get notification (a messagebox) whenever a new window is created on the operating system.

In my win32 dll

I put following code.

<br />
#include "stdafx.h"<br />
#include "hookdll.h"<br />
<br />
HHOOK WndHook; <br />
HINSTANCE hInst;<br />
<br />
__declspec(dllexport) bool  InstallHook(void); <br />
__declspec(dllexport) bool  UninstallHook(void); <br />
__declspec(dllexport) LRESULT CALLBACK WndHookProc(int, WPARAM, LPARAM); <br />
<br />
<br />
<br />
<br />
BOOL APIENTRY DllMain( HANDLE hModule, <br />
                       DWORD  ul_reason_for_call, <br />
                       LPVOID lpReserved<br />
					 )<br />
{<br />
    switch (ul_reason_for_call)<br />
	{<br />
		case DLL_PROCESS_ATTACH:<br />
		case DLL_THREAD_ATTACH:<br />
		case DLL_THREAD_DETACH:<br />
		case DLL_PROCESS_DETACH:<br />
			break;<br />
    }<br />
<br />
	hInst = (HINSTANCE)hModule; <br />
<br />
    return TRUE;<br />
}<br />
<br />
<br />
// This is an example of an exported variable<br />
HOOKDLL_API int nHookdll=0;<br />
<br />
// This is an example of an exported function.<br />
HOOKDLL_API int fnHookdll(void)<br />
{<br />
	return 42;<br />
}<br />
<br />
// This is the constructor of a class that has been exported.<br />
// see hookdll.h for the class definition<br />
CHookdll::CHookdll()<br />
{ <br />
	return; <br />
}<br />
<br />
<br />
__declspec(dllexport)  bool  InstallHook(void) <br />
{ <br />
    if(WndHook == NULL) <br />
        WndHook = SetWindowsHookEx(WH_SHELL, (HOOKPROC)WndHookProc, <br />
hInst, 0); <br />
<br />
    return (WndHook != NULL); <br />
} <br />
<br />
__declspec(dllexport) bool  UninstallHook(void) <br />
{ <br />
    if(WndHook != NULL) <br />
    { <br />
        if(UnhookWindowsHookEx(WndHook)) <br />
            WndHook = NULL; <br />
    } <br />
    return (WndHook == NULL); <br />
<br />
<br />
} <br />
<br />
<br />
__declspec(dllexport) LRESULT CALLBACK WndHookProc(int nCode, WPARAM wParam, LPARAM lParam) <br />
{ <br />
    if (nCode<0) <br />
        return CallNextHookEx(WndHook, nCode, wParam, lParam); <br />
    /* my codes...*/ <br />
<br />
	::MessageBox(NULL,"Window created","here",MB_OK);<br />
<br />
    return CallNextHookEx(WndHook, nCode, wParam, lParam); <br />
}

Now watch my client program.. MFC exe, dialog based. On its OkButton handler
I put following code. I am not using load library and getProce address , because I am linking the library in the project settings and copying the hookdll in the debug directory of my application .

<br />
void CHookclientDlg::OnOK() <br />
{<br />
InstallHook();<br />
}

But my client application can not call InstallHook.

Is this coding right or will it inform all the windows creation. (other applications , threads).

Please tell me

Marcoslav

Viorel.18-Jun-06 21:43

Viorel.

18-Jun-06 21:43

Uninitialized WndHook value can cause problems in your InstallHook function.

You should initialize it like this:

HHOOK WndHook = NULL;

What do you mean by "my client application can not call InstallHook"?

FarPointer18-Jun-06 21:49

FarPointer

18-Jun-06 21:49

HHOOK WndHook is a global variable and by default its zero.

Regards,
FarPointer
Blog:http://farpointer.blogspot.com/

marcoslav18-Jun-06 22:53

marcoslav

18-Jun-06 22:53

Thanks it worked.

But it went in to infinite loop, cos it was creating messagebox to show that some window was created. so for messagebox themselves also messagebox was getting displayed.. so infinite loop.

My first virus I guess Wink | ;)

Viorel.18-Jun-06 23:05

Viorel.

18-Jun-06 23:05

In order to avoid infinite loop, I think you can first try this:

static bool isMyMessageBox = false;
if( ! isMyMessageBox)
{
    isMyMessageBox = true;
    ::MessageBox(....);
    isMyMessageBox = false;
}

If it works, you should take care it works in multi-threaded case too. (Probably TlsGetValue and TlsSetValue can help).

urgent please slove it as quickly as possible

FarPointer18-Jun-06 21:47

FarPointer

18-Jun-06 21:47

Well I guess you need to use the WH_CBT hook and check the LPARAM for the HCBT_CREATEWND.

Regards,
FarPointer
Blog:http://farpointer.blogspot.com/

happy_ram18-Jun-06 21:31

18-Jun-06 21:31

i ahve one dialog box ont that i have a bitmap i.e world map once i point out any point in that bitmap at that point i have to open a child dialog box on that we should get the relative time.
my problem is when i point out particular area i get hte child window. but i dinot get the time because this child window is taking the points from windows so that we are unble to campare with the parent dialog window.
please tell me how we get parent points in child or else how we can send pointsd from main to child window

Weiye Chen18-Jun-06 21:45

18-Jun-06 21:45

I assume the logic to determine the time is in your child dialog. If that is the case,

1) If you used GetCursorPos(...) to get your point, then you have to call ScreenToClient(...) to convert them to client coordinates.

2) Then before you display your child dialog with DoModal(), store these coordinates in your child dialog.

happy_ram18-Jun-06 21:57

18-Jun-06 21:57

if the point in the main dialog is (428,500) by using this
ScreenToClient iget x=-5;
so please help me,
sree.

Weiye Chen18-Jun-06 22:12

18-Jun-06 22:12

sree_as wrote:
if the point in the main dialog is (428,500)

Post some code on how you get your point, as well as the part where u call ScreenToClient(...)

happy_ram18-Jun-06 22:14

18-Jun-06 22:14

i used this in on timer in child window

GetCursorPos(&cp1);
ScreenToClient(&cp1);

i think screentoclient taking client as child window.
sree.

Weiye Chen18-Jun-06 22:24

18-Jun-06 22:24

ScreenToClient(...) takes 2 parameters, first one is a handle to your window, the second is your point. Since you are calling this in your child window, then you have to call GetParent() to get the handle to your parent window and pass it into ScreenToClient(...). e.g.

GetCursorPos(&cp1);
HWND hParentWnd = GetParent(/* Handle to your child window */);
ScreenToClient(hParentWnd, &cp1);

Mahesh Kulkarni18-Jun-06 22:47

Mahesh Kulkarni

18-Jun-06 22:47

Weiye Chen wrote:
GetCursorPos(&cp1);
HWND hParentWnd = GetParent(/* Handle to your child window */);
ScreenToClient(hParentWnd, &cp1);

I Think following change sholud be there in program.

<br />
::ScreenToClient(hParentWnd, &cp1);

Check the Scope Resolution Operator( :: ) before ScreentoClient API.

I Think this correction should be there.

The secret of life is not enjoyment
but education through experience.
- Swami Vivekananda.

happy_ram18-Jun-06 22:49

18-Jun-06 22:49

sorry to say that the properties of the second dialog is not child it is pop up .is ur code is applicable to this one also,
sree.

Weiye Chen18-Jun-06 22:50