C / C++ / MFC Discussion Boards

Iain Clarke, Warrior Programmer21-Oct-08 1:51

21-Oct-08 1:51

Going back to your actual initial specification - you want to bring one of a pair of windows to the top of the local z-order, so you can only see the "chosen one"...

Assuming they're both created at the same place, why can't you do...

BOOL CMyDlg::ChangeMode (int nMode)
{
   CWnd *wndMode = LookupWindowFromModeSomehow (nMode);
   
   return wndMode->>SetWindowPos (&wndTop, 0,0,0,0, SWP_NOMOVE | SWP_NOSIZE);
}

?

Iain.

Write to console

rrrado20-Oct-08 6:46

rrrado

20-Oct-08 6:46

I have MFC dialog application. How can I write something to current console when it is ecexuted by "cmd"? It seems AllocConsole() creates new console which is closed after program exit.
Thank you.

Re: Write to console

David Crow20-Oct-08 7:31

David Crow

20-Oct-08 7:31

What about AttachConsole()?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Write to console

rrrado20-Oct-08 22:29

rrrado

20-Oct-08 22:29

It requires Windows Vista or Windows XP. I'd like to have it running on Win98 too.

Re: Write to console

David Crow21-Oct-08 3:01

David Crow

21-Oct-08 3:01

rrrado wrote:
I'd like to have it running on Win98 too.

Sorry. I must've missed that requirement in your initial post.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Write to console

rrrado21-Oct-08 4:19

rrrado

21-Oct-08 4:19

You didn't Laugh | :laugh:

Ok thanks anyway Smile | :)

Allocate more than 2GB using VirtualAlloc or new

umarcool20-Oct-08 5:39

umarcool

20-Oct-08 5:39

Hi all,

I am trying to allocate memory of more than 2GB using the system boot flag /3G and also i set the linker option /LARGEADDRESSAWARE. This should let me have atmost 3GB of allocation. After doing that, i try allocating slighly more memory than 2GB

BYTE* m_pDIB = (BYTE *)VirtualAlloc(NULL, (size_t)0x81000000, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
UINT32 ui32Err = GetLastError();
printf("\nVirtualAlloc(NULL, (size_t)0x81000000, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); Results: Address is %Xh and error is %d", m_pDIB, ui32Err);

I have also set the system virual memory(swap) to have bigger size than 3GB.

The error code returned is ERROR_NOT_ENOUGH_MEMORY with the VirtualAlloc returning NULL.

Any help in this regard would be greatly appreciated.

Best regards,
RUI

Re: Allocate more than 2GB using VirtualAlloc or new

David Crow20-Oct-08 7:32

David Crow

20-Oct-08 7:32

umarcool wrote:
Any help in this regard would be greatly appreciated.

There has to be 2GB of contiguous memory available.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Allocate more than 2GB using VirtualAlloc or new

Cedric Moonen20-Oct-08 8:35

Cedric Moonen

20-Oct-08 8:35

Why the hell would you allocate soooo much memory OMG | :OMG:

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: Allocate more than 2GB using VirtualAlloc or new

umarcool21-Oct-08 0:17

umarcool

21-Oct-08 0:17

Yes i have increased the virtual memory to 15 GB now but this still does not work Confused | :confused:

I am trying using the code given below:

BYTE* m_pDIB = (BYTE *)VirtualAlloc(NULL, (size_t)0x81000000/*(size_t)1.7*1024*1024*1024*/, MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN, PAGE_READWRITE);
   UINT32 ui32Err = GetLastError();
   printf("\nVirtualAlloc(NULL, (size_t)0x81000000, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); Results: Address is %Xh and error is %d", m_pDIB, ui32Err);

   m_pDIB = (BYTE *)VirtualAlloc((LPVOID)0x81000011, 0x100, MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN, PAGE_READWRITE);
   ui32Err = GetLastError();
   printf("\nVirtualAlloc(LPVOID(0x81000000), 0x1000, MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN, PAGE_READWRITE); Results: Address is %Xh and error is %d", m_pDIB, ui32Err);

Regarding Auto Logon

H4u3220-Oct-08 5:12

H4u32

20-Oct-08 5:12

Hi all,
I want to enable Auto logon feature through my application. I got help for doing so manually from the below link.
http://support.microsoft.com/kb/315231[^]

But if i try to do it programmatically then i am not being succeeded in that. I made all three registry entries(AutoAdminLogon, DefaultUserName, DefaultPassword) correctly through programming as mentioned in manual steps in above link. If i do it manually it works.

But somehow it is not happening. can anyone please throw some light on this? It would be a great help to me. Please help me out.

Thanks
Hemang

Re: Regarding Auto Logon

David Crow20-Oct-08 7:35

David Crow

20-Oct-08 7:35

When you add those value through code, can't you just open the registry and see if they are correct? The registry does not care how keys and values are created. If they are correct, something else other than your code is wrong.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

How to use a smoothing algorithm

Abhijit D. Babar20-Oct-08 4:50

Abhijit D. Babar

20-Oct-08 4:50

Hello,
I have to use a smoothing algorithm in my COde. I am using Visual C++ .Net 2008 with 3.5 framwork.
I am reading a data through serial port from a target device and this data is store into a XML file. I have to display(plot) this data on the window. For ploting the waveform, i read the data from the XML file, and draw(Plot) the point using "Drawline" function. but the curve generated is not in Smooth shape. It shows some noise(like steps).So in this case I want to use smoothing algorithm but dont know how to use it.So plz can anyone tell me how to use smoothing algorithm? its urgent so plz help me out.

Thanks and Regards,

Abhijit

Re: How to use a smoothing algorithm

Matthew Faithfull20-Oct-08 5:16

Matthew Faithfull

20-Oct-08 5:16

For urgent questions key plz into Google. For 'smoothing algorithm' you might try Googling for 'smoothing algorithm' or even for Bezier. Good Luck.

"The secret of happiness is freedom, and the secret of freedom, courage."
Thucydides (B.C. 460-400)

shortcut key create in mfc

mathy20-Oct-08 4:10

mathy

20-Oct-08 4:10

how create a shortcut key of each button control mfc code

Re: shortcut key create in mfc

Alan Balkany20-Oct-08 4:24

Alan Balkany

20-Oct-08 4:24

Put an ampersand (&) character before the shortcut key you want in the button's text.

For example: "&Cancel". 'C' is the shortcut key, and the button with this text can be invoked with Alt-C. The ampersand won't be displayed.

Re: shortcut key create in mfc

mathy20-Oct-08 23:41

mathy

20-Oct-08 23:41

thank Alan Balkany,
that is working perfectly
thank u very much. Smile | :)

Re: shortcut key create in mfc

David Crow20-Oct-08 4:28

David Crow

20-Oct-08 4:28

mathy wrote:
...a shortcut key of each button control...

Also called a mnemonic.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

CTreeCtrl Problem

Dhiraj kumar Saini20-Oct-08 3:35

Dhiraj kumar Saini

20-Oct-08 3:35

Hi,

I am using a CTreeCtrl control in my application with a Single root node and having severla item.
I want when the CTreeCtrl is displayed the root should be intially be already expanded.

Please tell how to achieve it.

Thanks In Advance.

Dhiraj

Re: CTreeCtrl Problem

SandipG 20-Oct-08 3:44

SandipG

20-Oct-08 3:44

what about reading some documentation??
Does CTreeCtrl::Expand[^] help?

Regards,
Sandip.

Asynchronous echo server

gamzi20-Oct-08 3:15

gamzi

20-Oct-08 3:15

Hi! I am asked to code an asynchronous non-blocking echo server in C++ that compiles in both Windows and Unix platforms. Having no background in networking, I don't know where to start. Any help would be appreciated. Thank you.

Re: Asynchronous echo server

SandipG 20-Oct-08 3:34

SandipG

20-Oct-08 3:34

Does this[^] help?

Regards,
Sandip.

Re: Asynchronous echo server [modified]

gamzi20-Oct-08 4:06

gamzi

20-Oct-08 4:06

Thanks! I have background in C++ but don't have any background in network programming. Can I ask for a tutorial on how to begin coding my project? Any help would be appreciated. Thanks!

modified on Monday, October 20, 2008 10:37 AM

Re: Asynchronous echo server

Rajesh R Subramanian20-Oct-08 4:55

Rajesh R Subramanian

20-Oct-08 4:55

gamzi wrote:
Can I ask for a tutorial

The link page previously provided to you has a "Tutorials" link too!

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Asynchronous echo server

Moak20-Oct-08 7:10

Moak

20-Oct-08 7:10

Additional to what Sandi said, here are two good resources to start at:

Beej's Guide to Network Programming (OS independent)[^]
Winsock Programmer's FAQ[^] ... gives an echo server example.

Hope it helps Smile | :)

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