C / C++ / MFC

bhanu_850922-Jul-08 20:39

bhanu_8509

22-Jul-08 20:39

Dear Steve and Mark,

For the m_hWnd ,the value is NULL. When I inspect the variable, I have the following value.

CXX0030: Error: expression cannot be evaluated

Please advice.

Stephen Hewitt22-Jul-08 20:41

Stephen Hewitt

22-Jul-08 20:41

Looks like you haven't created the window yet (as Mark said). See the CWnd::Create[^] function and its friends.

Steve

bhanu_850922-Jul-08 22:40

bhanu_8509

22-Jul-08 22:40

Dear Steve,

I am creating a Window from my own class like below. The window is created properly. I can see the window also. Please advice.

m_pWnd1 = new CMywnd1;
			if(!m_pWnd1->CreateEx(NULL,
				AfxRegisterWndClass(NULL,0,
				(HBRUSH)::GetStockObject(BLACK_BRUSH),0),
				LPCTSTR(""), WS_POPUP | WS_VISIBLE | WS_SYSMENU  ,
				115,51,600,405,my_hWnd1,NULL,NULL))
				return;
			my_hWnd1 = m_pWnd1->GetSafeHwnd();

bhanu_850923-Jul-08 1:23

bhanu_8509

23-Jul-08 1:23

Dear Steve and Mark,

I had overcome the issue in a tricky way (dont know the exact problem). I called the SetTimer in OnInitDialog() and it seems to be working fine. Actually, I am creating a popup dialog after creating the main dialog in my program. But I tried giving the SetTimer() before creating the popup window but the same error presists. When I give in OnInitDialog() I dont have any assertion error.

Please advice. Anyhow, I solve the problem without knowing what is actually happening.

Thank you very much for your kind responses.

Many thanks.

Re: Networked High Scores

Mark Salsbery23-Jul-08 6:16

Mark Salsbery

23-Jul-08 6:16

bhanu_8509 wrote:
When I give in OnInitDialog() I dont have any assertion error.

That's because that's the first place you can use a CWnd object where its
HWND is valid Smile | :)

That's a perfectly acceptable place to call SetTimer(). Any time before the
WM_INITDIALOG message is received, the HWND isn't set yet, causing the error.

Any time AFTER your CreateEx() call should be fine too, as long as the create
succeeded. WM_INITDIALOG is just one of the messages sent DURING creation.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Networked High Scores

Ackmm722-Jul-08 4:59

Ackmm7

22-Jul-08 4:59

Hey I was wondering what the best way to communicate my high scores to my website. I have a highscores.bin file and I need a way to open a socket on port 80 and upload/grab it from the server. Is this even possible and if not whats an easier way.

Moak12-Aug-08 13:43

Moak

12-Aug-08 13:43

Look for a HTTP client or FTP client class. A FTP client is probably easier... with an HTTP client you need to install a CGI/script that allows uploading files to the web server.

Hope it helps!

/M

My Webchat in Europe Java | [Coffee]

File Copy

Chandrasekharan P22-Jul-08 0:54

Chandrasekharan P

22-Jul-08 0:54

Hi,

I am creating a binary file in my application and i need to copy this binary file to another location using the CFileDialog class. how do i do that.

Re: File Copy

_AnsHUMAN_ 22-Jul-08 1:02

_AnsHUMAN_

22-Jul-08 1:02

Get the path where you have to copy the file from CFileDialog and use CopyFile(/*params*/) or see SHFileOperation

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

_AnShUmAn_

encrypting the stderr of console+socket redirection

FotisSs22-Jul-08 0:14

FotisSs

22-Jul-08 0:14

Hi there people.

I'm trying to redirect the stderr of a process let's say cmd.exe to a raw socket.
I have completed this task by setting the sterr parameter = my socket handle.

I was looking for a function that can take this handle and encrypt the stderr before
sending it to the socket. I could use CreateFile for exampe in order to cache the data
to a file and encrypt it here but it's a bad ugly solution.

In fact I was looking something like CreateBuffer or CreateByte array or MemoryStream of C#.
In other words an intermediate function with a HANDLE input that can return the bytes or something
in order to encrypt them.

Thanx

870501 - registry

ilostmyid221-Jul-08 22:58

ilostmyid2

21-Jul-08 22:58

hi how can i read entries from a specified section in the registry while i don't know the entries names? i need to read them all, whatever they might be.
i know that a way is to put a key in the section with a specified name valued with the number of entries and specify retrievable names for the others.
but is there any way other than this? i like to enumerate all of them without having to know the names exactly.
i hope i could describe my question
thx

CPallini21-Jul-08 23:05

21-Jul-08 23:05

Does RegEnumKey [^] fit your needs?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Rajesh R Subramanian28-Jul-08 1:50

Rajesh R Subramanian

28-Jul-08 1:50

I began in 1984 with a ZX Spectrum, learning BASIC and Z80 Assembly, then I sleept for a while before returning to programming.

It is very unfair of you to have sleepted. Laugh | :laugh:

My troll needs to be attended here[^] Suspicious | :suss:

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

CPallini28-Jul-08 2:09

28-Jul-08 2:09

Rajesh R Subramanian wrote:
I began in 1984 with a ZX Spectrum, learning BASIC and Z80 Assembly, then I sleept for a while before returning to programming.

Thank you for pointing out.

Rajesh R Subramanian wrote:
My troll needs to be attended here[^]

Fixed. (Being so recent, in this morning patrol I didn't catch it).
Smile | :)

Rajesh R Subramanian28-Jul-08 2:10

Rajesh R Subramanian

28-Jul-08 2:10

Some lardass downvoted this[^] too. Hmmm | :|

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

CPallini28-Jul-08 2:14

28-Jul-08 2:14

[military tone]
Fixed Sir!
[/military tone]
Big Grin | :-D

Rajesh R Subramanian28-Jul-08 2:18

Rajesh R Subramanian

28-Jul-08 2:18

Thanks pal. Smile | :)

But why is your profile standing not corrected? Still shows "Sleept". Confused | :confused:

May be I am receiving a copy from some local server's cache.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

CPallini28-Jul-08 2:26

28-Jul-08 2:26

Rajesh R Subramanian wrote:
May be I am receiving a copy from some local server's cache.

0r maybe someone's is just too lazy... Roll eyes | :rolleyes:

[again militare tone]
Sir, I'm going to fix it, Sir!
[/again militare tone]

Smile | :)