Problem with UDP packets - C / C++ / MFC Discussion Boards

Re: Binary Resource Data

Ravi Bhavnani8-Apr-05 7:59

Ravi Bhavnani

8-Apr-05 7:59

Gak! Beg withdrawn.

/ravi

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Splitter Window get/pass information

poiut8-Apr-05 5:33

poiut

8-Apr-05 5:33

I am using MFC with Explorer style. Basically the Left panel split has it's own class and own file. How would I get LeftView to get/pass information to? I have never actually done get/pass class info which isn't declare in the other one.

Would it be similar to

inline CClassDoc* CClassView::GetDocument() const
{ return reinterpret_cast<cclassdoc*>(m_pDocument); }

Thanks

Re: Splitter Window get/pass information

RobJones8-Apr-05 18:27

RobJones

8-Apr-05 18:27

You could do something like this, inside your frame that created the split.

CLeftView* CMyChildFrame::GetLeftPane()
{
	CWnd* pWnd = m_wndSplitter.GetPane(0, 0);
	CLeftView* pView = DYNAMIC_DOWNCAST(CLeftView, pWnd);
	return pView;
}

Whoever said nothing's impossible never tried slamming a revolving door!

How to use non .NET DLLs in .NET environment?

Khang Nguyen8-Apr-05 5:30

Khang Nguyen

8-Apr-05 5:30

Happy Friday! Gurus,

I am trying to use the logics from Intel OpenCV DLLs, which were originally compiled by MSVC++ 6. From C# or ASP.NET Apps, when I was trying to add reference to these DLLs (i.e. cv096.dll or cxcore096.dll), I got this error:

“A reference to ‘D:\Programs\OpenCV\bin\cv096.dll’ could not be added. This is not a valid assembly or COM component. Only assemblies with extension ‘dll’ and COM components can be referenced. Please make sure it is a valid assembly or COM component.”

Note: The source code of Intel OpenCV DLLs is open source. I can open this source code project in either MSVC++ 6 or VS.NET 2003.

Question: How can I use these DLLs in .NET environment, preferably in ASP.NET and C# projects?

Thanks with a million
Khang
Smile | :)

Re: How to use non .NET DLLs in .NET environment?

C^hris L^osinger8-Apr-05 7:01

C^hris L^osinger

8-Apr-05 7:01

Khang Nguyen wrote:
How can I use these DLLs in .NET environment, preferably in ASP.NET and C# projects?

don't know about those specific DLLs, but you can import functions from C-interfaced DLLs (ie. non-COM, non-MFC) by using the DLLImport keyword

ex:

[DllImport("MyDll.dll", EntryPoint="DLLFunctionName")]
public static extern ...return type... DLLFunctionName(...params...);

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Re: How to use non .NET DLLs in .NET environment?

Khang Nguyen8-Apr-05 8:00

Khang Nguyen

8-Apr-05 8:00

Chris, thank you very much for you tip. Havea good weekend.

create Network Setup Wizard

javad_20058-Apr-05 5:17

javad_2005

8-Apr-05 5:17

How to Create Network Setup Wizard in MFC

Problem with UDP packets

Virendra Sharma8-Apr-05 5:17

Virendra Sharma

8-Apr-05 5:17

Hello friends,
I have developed one multi-threaded client-server app in VC++. with audio communication. Voice is transferred using UDP packets. The application works well with dial up communication but when I tried it on CableNet and on machines on the intranet having shared internet connection, it failed. I have checked the incoming UDP packets and found that only a few UDP packets reach to that computer (say 1 out of 100). I am not getting how to deal with this problem.

I have used TCP connection for text messaging and it works fine in both of the above situations.

The problem is with audio packets in UDP format.

I am looking for an immediate help as my project is in progress.

Thanks,
CoolVS

Re: Problem with UDP packets

Indivara8-Apr-05 19:23

Indivara

8-Apr-05 19:23

UDP doesn't guarantee delivery by specification, you'll have to use TCP

RFC 768 - User Datagram Protocol[^]

This protocol  provides  a procedure  for application  programs  to send
messages  to other programs  with a minimum  of protocol mechanism.  The
protocol  is transaction oriented, and delivery and duplicate protection
are not guaranteed.  Applications requiring ordered reliable delivery of
streams of data should use the Transmission Control Protocol (TCP) [2].

CPropertySheet problem

Bob Stanneveld8-Apr-05 2:04

Bob Stanneveld

8-Apr-05 2:04

Hello,

I'm having some trouble with the CPropertySheet. Here is the scenario: The PropertySheet doesn't have a 'Aplpy' button. The property pages contain information that need to be verified when the user clicks the 'Ok' button.

Here is my problem:
After having determined that the data is invalid, the property sheet should not close, but remain visible so that the user can correct the information.

I also got the blogging virus..[^]

Re: CPropertySheet problem

toxcct8-Apr-05 2:24

toxcct

8-Apr-05 2:24

what is your code ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: CPropertySheet problem

David Crow8-Apr-05 4:49

David Crow

8-Apr-05 4:49

Bob Stanneveld wrote:
The PropertySheet doesn't have a 'Aplpy' button.

Is it supposed to have one or did you remove it on purpose?

Bob Stanneveld wrote:
The property pages contain information that need to be verified when the user clicks the 'Ok' button.

This is a bad approach. Do not enable the OK button if invalid data exists.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: CPropertySheet problem

Bob Stanneveld10-Apr-05 21:00

Bob Stanneveld

10-Apr-05 21:00

DavidCrow wrote:
Is it supposed to have one or did you remove it on purpose?

I removed it on purpose, since the property sheet isn't really an options dialog. No options can be 'applied' to the program, but need to be set before starting a sub process.

Thanks for your reply. I solved the problem using the OnApply method (this is even called though it does not have an apply button). I rather give a fault summary when the user submits data than handling every notification and verify the data individually.

I also got the blogging virus..[^]

Re: CPropertySheet problem

Michael Dunn8-Apr-05 6:44

Michael Dunn

8-Apr-05 6:44

Your PSN_APPLY handler can return PSNRET_INVALID to prevent the sheet from closing.

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

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Re: CPropertySheet problem

Bob Stanneveld10-Apr-05 21:01

Bob Stanneveld

10-Apr-05 21:01

Thanks! I thought that that method was not called since the dialog didn't have an 'apply' button.

I also got the blogging virus..[^]

Close Dialog in OnInitDialog

AnTri8-Apr-05 2:02

AnTri

8-Apr-05 2:02

How can I close a dialog in OnInitDialog. I need this because some checks where made in this function. If the check fails I need to cancel the dialog creation...

Thanks ...

Re: Close Dialog in OnInitDialog

toxcct8-Apr-05 2:23

toxcct

8-Apr-05 2:23

EndDialog() should help

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Close Dialog in OnInitDialog

Joel Holdsworth8-Apr-05 2:24

Joel Holdsworth

8-Apr-05 2:24

You could simply make a call to CDialog::EndDialog(IDCANCEL)

Joel Holdsworth

Wanna give me a job this summer?
Check out my online CV and project history[^]

Re: Close Dialog in OnInitDialog

David Crow8-Apr-05 4:50

David Crow

8-Apr-05 4:50

Call EndDialog() with a value indicating that initialization failed. Using IDCANCEL is a bit misleading.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: Close Dialog in OnInitDialog

liquid_8-Apr-05 7:34

liquid_

8-Apr-05 7:34

I would advise you analyse the logic of your program. For me, the situation is like this: the dialog should not be displayed at all if the validation fails. Consequently the DoModal() should not be called at all.

Re: Close Dialog in OnInitDialog

David Crow8-Apr-05 7:57

David Crow

8-Apr-05 7:57

If DoModal() is not called, then the dialog's OnInitDialog() method will not get called, which is where the initialization is taking place.

If it's actual validation that is taking place in the OnInitDialog() method then you are right, it should be done outside of the dialog.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: Close Dialog in OnInitDialog

ThatsAlok8-Apr-05 19:17

ThatsAlok

8-Apr-05 19:17

why don't you simple Post Close Message i.e.

this->PostMessage(WM_CLOSE,0,0);

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Alok Gupta
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Moving a bit map Image By keyboards Key MFC

hprasain8-Apr-05 1:07

hprasain

8-Apr-05 1:07

I can move the bitmap image by using the keyboard keys .
Problem#1.
i could't select which image to move,selection is made by default the last image it loads.
Problem#2.
when i move the image the painting is made along the previos thing it has painted.But when i minimize the window the problem will be solved .
I have made function call Invalidate() from On_KeysDown ().

How could i solve those Problems?/
Will any body help me please??
With lots of hope.

hprasain

Loading Two or more Bitmap Image in Custom Static control MFC

hprasain8-Apr-05 0:59

hprasain

8-Apr-05 0:59

I am unable to load two or more BItmap image in Custom HyperLink Control,
I have made by own custom cotrol by inherating CWnD:: .If i load two image too but when ever i minimize the window only the later bitmap remain.
Will any body help me please??
with lost of Hope...

hprasain

Inteface name of Windows explorer

includeh108-Apr-05 0:50

includeh10

8-Apr-05 0:50

Inteface name of Internet explorer is IExplorer.
Do you know Inteface name of Windows explorer?

includeh10

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