C / C++ / MFC Discussion Boards

toxcct wrote:
this answers the first part of the question (starting other exes)

Which is all I intended to answer, hence the quoted text.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

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

DavidCrow wrote:
Which is all I intended to answer, hence the quoted text.

oh,

hehehe, my bad David. Wink | ;)

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[VisualCalc 3.0][Flags Beginner's Guide]

   DavidCrow's suggestion works for launching the two applications. You can then get their handles, and you can keep checking the handles to see if either one (or both) of the child apps have closed.

   To implement the close the other two when I close functionality, you can create a Named Event object, and signal it when the launching (parent) application starts to shutdown. The two child apps can check that event to see when they should shut down, and the parent app can check the child app's handles to know when they have shutdown and it can then complete its shutdown (or terminate the child app if it gets hung up and does not close on its own).

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

If you use CreateProcess to start the other apps, you can do this froim the OnClose override in CMainFrame...

// using SendMessage will cause the sending app to wait until the other app 
// responds to the message, thus signaling the calling app that it's okay 
// to shut close the handles.
SendMessage(m_hWndTelemetry, WM_CLOSE, 0, 0);
CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

   Closing the handles as shown will not cause the applications to shut down, so I am not sure that this was your intent, it simply releases the calling/parent app's "reference" to them, same as how closing a thread handle does not cause that thread to die immediately.

   I do not believe that your suggestion will allow the calling app to ensure that the child apps have closed - they can ignore the WM_CLOSE message, or otherwise return from handling it and still be running.

   Actually waiting for the handles to become signaled tells you when the apps have shut down (or, after a certain timeout, that they have not).

--- Edit: OK - you may have been specifically talking about how to cause the other two applications to initiate shutdown, as opposed to my suggestion of using an Event. Yes, that works as well, and is a bit simplier, but it should be mentioned that this only works for applications/processes that have a window and are pumping messages. And you still have to get the window handles for those child processes.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

I'm getting closer to MFC each day D'Oh! | :doh:

I have now got into the habit of using thunks whenever a callback may be required within one of my classes. My code works perfectly, but only on Intel 32bit machines. I have placed exclusion guards around my template to prevent compiling for anything other than said machine, but now is the time to do it correctly.

This is my thunk:

struct THUNK
{
    m_mov     = 0xB9;  // mov to ecx this ptr
    m_this    = obj;
    m_jmp     = 0xE9;  // jmp to new address
    m_relproc = Cast<char*>(proc) - Cast<char*>(this) - sizeof(THUNK);
}

This allows me to thunk without casting the hWnd paramaters. What would the equivlent be for a 64bit machine?

   Not knowing that much about thunks anymore, my first guess would be to account for the pointer size and structure layout/padding differences (this goes from 32-bit to 64-bit, and the size of the structure may now lie on a different boundary), but other than that, nothing that I can think of.

   But I am no expert in the field of thunks... :P

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Hi,

I am a bit curious.. Can I raise exception (with RaiseException()?)
and get it handled in another thread??

This is needed for operation stop-functionality.
I thought it would be nice to have one dialog
where is stop button, and it stops whatever the
main thread is doing..

Does anybody know how it is done in Visual Studio?
It's possible to freeze the debugged process anytime,
when debugging.

I do not think that the exception will cross threads. I would suggest using a Win32 Event object, because it can be seen by multiple threads, and signal it in one thread to indicate the other to stop processing.

Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

chilituna wrote:
I thought it would be nice to have one dialog
where is stop button, and it stops whatever the
main thread is doing..

Is the dialog modal?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

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

chilituna wrote:

Can I raise Exception in one thread and handle it in another?

No, the handler has to be somewhere in the throwing thread's call stack.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ");

Hi, again a question about me with my IOCP skills Smile | :)

ok, the situation is the following, everything works perfectly except for 1 thing, a really weird thing if you ask me.
I'm currently testing so i use 1 WorkerThread with 1 udp virtual connection at the time.
When i do a WSARecvFrom, i should recieve a buffer with a size of lets say 600 bytes. This hapends idd but later, here is my thing:

GetQueuedCompletionStatus(...)<br />
DWORD ioSize = 0;<br />
case RequestSend:<br />
//WSASendTo and set to AfterSend<br />
break;<br />
case AfterSend:<br />
//Sended 8 bytes, now recieve with WSARecvFrom and set to AfterRecieve<br />
ioSize = static_cast<DWORD>(lpOverlapped->InternalHigh);<br />
break;<br />
case AfterRecieve:<br />
ioSize = static_cast<DWORD>(lpOverlapped->InternalHigh);<br />
//do rest

This is the things i do, now it happends that in AfterRecieve, ioSize is the same as the size when i sended. better said, the data aint recieved yet, however i do get a notification that the data is recieved. When i put a breakpoint at that point, i see that the data is deliverd, to pull a conclusion, I get a notification when the data is recieved well it isnt untill i put a breakpoint at that place, really weird
weird story so:

dwIoSize = static_cast<DWORD>(ptrOverlapped->InternalHigh);<br />
ptrSession->incRecvBytes(dwIoSize);<br />
if ((iTemp = ptrGameClass->UnpackServerInfo(ptrSession->getNDServer(), &objToolset)) == 0){//Session is finished!<br />
    pThis->FinishGame(ptrSession->getNDServer());<br />
    __REPORT("SUCCEEDED");<br />
}<br />
else if (iTemp < 0){<br />
    __REPORT("%s->UnpackServerInfo() failed", ptrGameClass->Gamename());<br />
}

To make it even more clear, whenever i put a breakpoint at: ptrSession->incRecvBytes(dwIoSize);, dwIoSize is 8 as the send buffer, but ptrOverlapped->InternalHigh is like 600 bytes.
When i do reports, it just reports that ptrOverlapped->InternalHigh is 8

For socket operations you should't be touching (or looking at) anything in the OVERLAPPED
structure. None of it applies to IOCPs and especially the "Internal" fields which are for use
by the system so they have NO meaning to your code.

Ok, you can look at them, but don't expect any specific values Smile | :)

I would suggest clearing the OVERLAPPED struct to 0s before every operation.
If you need to add your own fields (I'm not sure how one would do overlapped ops without doing
this) then define your own struct which includes an OVERLAPPED struct.

You may have seen these, but here's a couple articles that helped me alot when I first used an
IOCP...

Writing Windows NT Server Applications in MFC Using I/O Completion Ports [^]

Windows Sockets 2.0: Write Scalable Winsock Apps Using Completion Ports[^]

INFO: Design Issues When Using IOCP in a Winsock Server[^]

~~And this one's in the online help -~~ <--edit

-- modified at 13:21 Tuesday 16th January, 2007

Hi,

I want to use the Code Snippets in Visual C++ VS2005 Professional.
But it seems it's not exist here.
When I go menu Tools\Code Snippets Manager I can not select a C++ from the "Language" combo box.
Is there some way to activate the Code Snippets stuff in C++, or it's available in another editions of Visual Studio 2005(for example VS2005 Developer Edition)?

Thanks.

Code snippets don't exist in C++, apparently, we're too smart to need them

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Ha!

Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Christian Graus wrote:
Code snippets don't exist in C++,

Yea they do, I downloaded it but still haven't gotten around to installing See > Microsoft Visual Studio 2005 IDE Enhancements[^]

I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:

oleg63 wrote:
Code Snippets in Visual C++ VS2005

C++ was not included as part of the original snippet functionality. They did add it in later via a power toy. See Microsoft Visual Studio 2005 IDE Enhancements[^]

I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:

Hi
I have built an app using the TransparentButtonDemo and Video Manipulation demos i have found on here. The video is using vmr9 and the relevant video is loaded and starts playing dependant on the button pressed on my dialog.

It is going to be necessary to have some information overlayed on the video while it is playing but any dialog items i add render behind the video. Is there an easy way to get a couple of mfc components to render on top of the video?

Thanks in advance guys

Dave

Not without flicker. Every time a new frame is drawn it will be on top.

The video mixing renderer, as its name implies, is made for mixing video. You can alpha-blend
any bitmap onto the video stream. I suppose you could draw dialog items to a bitmap and mix them
with the video but I'm not sure how the user interface would work.

An easier method would be (IMO) to write your own renderer so you can control the rendering of
frames. You could use clipping regions or whatever to allow underlying items to show through.

Mark

Hi Friends,

In my application, I created no of static label at run time and it derived from CStatic class. That static window placed by SetWindowPos function.
example:

m_Label.SetWindowPos( pWnd->wndTOp, CRect ( 10,10,50,50),SWP_SHOWWINDOW);

The first parameter used to set the window zorder . Am I correct?

At run time, How can the user select pariticular control when they are overlapped?
Like,In MS word document, The user can draw no of rectangle box and overlapped between them. The user can able to select the top most window or the tracker enable window.

In my application, I am using CRectTracker class. It used to track the static label.How can i select tracker enabled label or top of the label when they are overlapped?

Thanks and Regards,

<b></b>

Vichu

Vishvanathan wrote:
The first parameter used to set the window zorder . Am I correct?

Nope. The first parameter is the handle of the window, after which you will insert your window). The last parameter is the new z-order.

Have a look at this article[^] for the rest of your question.

   The OP seems to be calling the CWnd version of the function, in which the first parameter is the window to to insert after in the Z-Order.

   Neither the CWnd or Win32 version of the function takes an HWND as the last parameter, although the last parameter (flags) indicates how to treat that parameter.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Vishvanathan wrote:
The first parameter used to set the window zorder . Am I correct?

   Yes, but the last parameter tells the function how it should treat the Z-Order parameter.

   I believe that the functionality of object selection in applications like Word and Visio is implemented by the application itself. There is nothing that I know of built into Win32 to give you that kind of "design-space" functionality.

   You will have to track where the user is clicking the mouse, and see what object(s) are under that point, and then select a particular control depending on what the user is trying to do. For example, are they trying to select an item, select an additional item to add it to a group selection, or remove an item from a group selection, and then you will be able to extend your selection rectangle (or multiple ones) around the objects involved.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Greetings everyone, I need to connect a visual embedded c++ application to a sql2000 database over a wifi connnection. I am rather new in the c++ development, so please bear with me.
And as far as i got, i'm struggling to import the msado15.dll file to my application. As i think i should as far as the examples go.

But at compile time i get a whole lot of errors because of msado15.dll
In which file should i actually import the dll?
And is it with the

#import "msado15.dll" rename("EOF", "adoEOF")
string?

Thanks in advance.