SDI project problem - C / C++ / MFC Discussion Boards

Re: How to find the application crash reason in multithreaded MFC application

ComplexLifeForm12-Jul-07 19:49

12-Jul-07 19:49

Hi All,

Thanks for your valuable inputs. I will follow the suggestions given.
Hopefully I should be able to nail down the crashing issue now.

Regards
Smile | :)

Re: How to find the application crash reason in multithreaded MFC application

Mark Salsbery13-Jul-07 16:26

Mark Salsbery

13-Jul-07 16:26

Maybe someone mentioned this, but if you can get it to crash fairly easy, you can then attach the
debugger to the process and work your way back through the call stack (on any thread).

You don't need to be running in the debugger or have breaakpoints set.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the number 3

Re: How to find the application crash reason in multithreaded MFC application

DevMentor.org13-Jul-07 20:56

DevMentor.org

13-Jul-07 20:56

good point!

heck even a crash dump will help Poke tongue | ;-P

learn how to take a dump....lol it's potty training time!!! ...brings tears to my eyes, lil-jr is growing up Cry | :((

you can always load the dump into your debugger of choice and work backward that way too!

Yours Truly, The One and Only!

Winsock Interrupt

simoncoul12-Jul-07 7:54

simoncoul

12-Jul-07 7:54

I have created a small program that creates a 5 byte TCP packet to a server then the server sends it back. I'm unsure of how the wisock send and recv functions work exactly, does it just poll the connection until there is something in the buffer or is there an interrupt. I'm suppost to setup an interrupt, so any info you know or a good place I could find this info would be great!

Thanks

Simon

Re: Winsock Interrupt

markkuk12-Jul-07 10:07

markkuk

12-Jul-07 10:07

Interrupt handling will happen in the device driver level, not in Winsock or in the transport service provider that implements the TCP/IP protocol.

Re: Winsock Interrupt

Nuxser12-Jul-07 17:56

Nuxser

12-Jul-07 17:56

Default behavior of send(...) & recv(...) is blocking on the call till requested operation is finished.

Not aware of how this wait is internally implemented.

As an application programmer, I assume that you want to model your application so that it doesn't block on such calls and utilize the CPU cpu cycles for other tasks. If that is correct, you need to explore which I/O strategy we want to use:

http://tangentsoft.net/wskfaq/articles/io-strategies.html

Translating the "interrupt" to be the case where instead of blocking you want the program to be notified when data is there to read,
WSAAsyncSelect() can be an easy path to go as your app/window is notified through message loop.

-- Soyuz

Re: Winsock Interrupt

simoncoul16-Jul-07 3:23

simoncoul

16-Jul-07 3:23

Thanks for the information helped me alot!

SDI project problem

Max++12-Jul-07 4:12

Max++

12-Jul-07 4:12

I create SDI project that derive from CEditView (it look like NOTEPAD).
Then I create dialog project with some function that can open text file as well as show data of file in first project.I use ShellExecute() as

ShellExecute(NULL,"open","firstproject.exe","C:\\New Folder\\Text.txt","",SW_SHOW );

My problem is I can't open text file if that file keep in folder that the name including space charactor.
for example the above code
If the "Text.txt" keep in folder name is "NewFolder"(No space)it can open.
but if the folder name change to "New Folder" it will show Messagebox
"Access to C:\\New was denied".

Please give me some idea for solved this problem

Re: SDI project problem

Tony Hill12-Jul-07 4:34

Tony Hill

12-Jul-07 4:34

Try this

ShellExecute(NULL,"open","firstproject.exe", "\"C:\\New Folder\\Test.txt\"","",SW_SHOW );

Re: SDI project problem

Max++12-Jul-07 5:34

Max++

12-Jul-07 5:34

Thanks you but after I try
I got the Message "C:\New Folder\Test.txt was not found"

Re: SDI project problem

Tony Hill12-Jul-07 5:49

Tony Hill

12-Jul-07 5:49

Have you actually checked that there is actually a file there with that name?

Re: SDI project problem

Max++12-Jul-07 6:26

Max++

12-Jul-07 6:26

What about if I use variable for keep string?

<br />
void function(TCHAR m_szFile)<br />
{<br />
  ShellExecute(NULL,"open","Firstproject.exe",m_szFile,"",SW_SHOW );<br />
}<br />

because m_szFile I get from DragQueryFile() function
DragQueryFile ( hDrop, 0, m_szFile, MAX_PATH ) )

Re: SDI project problem

Tony Hill12-Jul-07 6:36

Tony Hill

12-Jul-07 6:36

You will still have to wrap quotes around the contents of m_szFile because it is a path that contains spaces.

Re: SDI project problem

Max++12-Jul-07 6:47

Max++

12-Jul-07 6:47

Thanks a lot.
The problem already solve. Laugh | :laugh:

Re: SDI project problem

David Crow12-Jul-07 4:34

David Crow

12-Jul-07 4:34

There's nothing wrong with the ShellExecute() statement. Look at how firstproject.exe is handling command-line arguments.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: SDI project problem

Max++12-Jul-07 5:20

Max++

12-Jul-07 5:20

Can you tell me more about this sentence
"firstproject.exe is handling command-line arguments"

Re: SDI project problem

David Crow12-Jul-07 5:25

David Crow

12-Jul-07 5:25

Such as?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: SDI project problem

Max++12-Jul-07 5:40

Max++

12-Jul-07 5:40

I use App wizard create first project.exe, I don't know how the program work when I call it to open file.

Dynamically adding sub menus

Abhijeet Pathak12-Jul-07 3:06

Abhijeet Pathak

12-Jul-07 3:06

Hi,

I have a doc/view app, main menu (IDR_MAINFRANE) and another menu (IDR_POPUPMENU1).
What i'm trying to accomplish is adding menu IDR_POPUPMENU1 as submenu to one of the
menu item in main menu.

I'm doing it in following way in OnUpdate():

<br />
CMenu csm;<br />
csm.LoadMenu(IDR_POPUPMENU1);<br />
<br />
VERIFY(pCmdUI->m_pMenu->CreatePopupMenu());<br />
pCmdUI->m_pSubMenu=&csm;<br />

and needless to say, it doesn't works...

can anyone help me out?

Thanks...

Re: Dynamically adding sub menus

jhwurmbach12-Jul-07 4:50

jhwurmbach

12-Jul-07 4:50

I use code from here[^] to merge two menus.
But I do TrackPopupMenu() with the result. This may be different, though the code claims it can handle top-level menus..

Failure is not an option - it's built right in.

Problem with Model Dialog box in a DLL

uday kiran janaswamy12-Jul-07 3:05

uday kiran janaswamy

12-Jul-07 3:05

Hi all,

I am having a dll with Dialog as a Resouce. I have created a Class for that Dialog also.

for example :

if Dialog Class is "one"

in the DLL Function

DLL Function()
{
one o;
o.DoModel(); // Here not populating the Dialog.
}

I then start debug the DLL. It is giving error in

BOOL CDialog::Create(LPCTSTR lpszTemplateName, CWnd* pParentWnd)
{
...
...

#ifdef _DEBUG
if (!_AfxCheckDialogTemplate(lpszTemplateName, FALSE)) --> here is the Error
{
ASSERT(FALSE); // invalid dialog template name
PostNcDestroy(); // cleanup if Create fails too soon
return FALSE;
}
#endif //_DEBUG

}

I am not able to Load the Dialog in the DLL. Please help me out.

Uday kiran

Re: Problem with Model Dialog box in a DLL

Y Mahi12-Jul-07 23:17

Y Mahi

12-Jul-07 23:17

before calling the function to display, you need to call the method AFX_MANAGE_STATE( AfxGetStaticModuleState();

Smile | :)

Re: Problem with Model Dialog box in a DLL

Hamid_RT13-Jul-07 2:01

Hamid_RT

13-Jul-07 2:01

Did you this code on the first line of your function

AFX_MANAGE_STATE(AfxGetStaticModuleState());

WhiteSky

Pointer Identifying problem

baerten12-Jul-07 1:40

baerten

12-Jul-07 1:40

Hi all,

at a certain place of my code i test the controls of my view on the RuntimeClasses.
If they are CEdit i make a special operation ...

At the View i send the variables (as value, not as pointer) to this function,
the function is MyDDX_Control which executes some operations before the variable of type CEdit or CStatic goes to the real DDX_Control-Function.
Already before i send the CStatic variables (in my case CFontStatic) to MyDDX_Control i check them
via the Watching-Tool

the first Label is correctly of type CFontStatic,
the second Label (also declared as CFontStatic) is as value of type CFontStatic and if i check
it as pointer with the watcher, the type is CCustomerView ( The Class-name of the view where the control is located ...

I've nothing changed into the source code appart some definitions.

I put into the class-header a blank-definition of classes which appears in this class and the include of the real header of the pointers into the .cpp

class xxx;

public class yyy
{

  public: xxx *var;

}

but appart of these changings i've nothing changed.

Is it possible that those changings provokes errors like this?

Big thanks !! Wink | ;)

Re: Pointer Identifying problem

baerten12-Jul-07 2:54

baerten

12-Jul-07 2:54

I saved the source code and restored old ones.
With the old source codes it works...

Now i have a lot of checks to do :S

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