C / C++ / MFC Discussion Boards

Re: Dealing with const CString ...

Cedric Moonen19-Mar-10 5:15

Cedric Moonen

19-Mar-10 5:15

Rajesh R Subramanian wrote:
It's good practice to release the buffer.

It's even better practice not to call GetBuffer if you don't need to Smile | :)

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Dealing with const CString ...

Rajesh R Subramanian19-Mar-10 5:16

Rajesh R Subramanian

19-Mar-10 5:16

Exactly, which I mentioned clearly in my previous post. Smile | :)

“Follow your bliss.” – Joseph Campbell

Re: Dealing with const CString ...

Joe Woodbury19-Mar-10 9:28

Joe Woodbury

19-Mar-10 9:28

Rajesh R Subramanian wrote:
you MUST call CString::ReleaseBuffer().

Only if you change the length of the string.

EditBox control Problem

shiv@nand19-Mar-10 3:58

shiv@nand

19-Mar-10 3:58

I have added a EditBox control to a Dialog and i have selected the property(number : true,VC++ 2005). i have validated, only number can be entered.if user enters characters it will not accept,ok it works fine.But when user copy some text and paste in EditBox it is accepting i am getting strange output. please help how to stop copy and paste text or any character in EditBox .

Re: EditBox control Problem

Adam Roderick J19-Mar-10 4:27

Adam Roderick J

19-Mar-10 4:27

For that you need to implement your own EditBox, like the example given ( Create your own controls - the art of subclassing[^])

And inside which you u have overiride the PreTranslateMessage.
eg:-

BOOL MyEditCtrl::PreTranslateMessage(MSG* pMsg) 
{
	// disable mouse and keyboard copy
	switch( pMsg->message )
	{
	case WM_KEYDOWN:
		{
		     switch( pMsg->wParam )
		      {
		                    case 0x56:
			    {
		                      if( GetKeyState(VK_CONTROL) )
		                       return true;
			    }
			  break;
		       }
		}
		break;

	case WM_RBUTTONDOWN:
		{
		     return true;
		}
		break;
	}
	
	return CMyEdit::PreTranslateMessage(pMsg);
}

Величие не Бога может быть недооценена.

Re: EditBox control Problem

Le@rner20-Mar-10 1:38

Le@rner

20-Mar-10 1:38

Check this::
http://www.codeguru.com/cpp/controls/editctrl/maskededitcontrols/article.php/c9771[^]

List Control to Excel

hellogany19-Mar-10 0:59

hellogany

19-Mar-10 0:59

Hi All

I am using Report View in List control with 5 to 6 columns.

I need to transfer thes data from each column to excel sheet.

Any Way to do it ??

Regards
Gany

Re: List Control to Excel

CPallini19-Mar-10 1:20

CPallini

19-Mar-10 1:20

Have a look at "How To Use MFC to Automate Excel and Fill a Range with an Array".
Smile | :)

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]

Re: List Control to Excel

mesajflaviu19-Mar-10 1:59

mesajflaviu

19-Mar-10 1:59

Or , you can look over here , I was used this class and work fine !

Re: List Control to Excel

Rajesh R Subramanian19-Mar-10 2:16

Rajesh R Subramanian

19-Mar-10 2:16

Apart from what was already suggested to you, you could consider exporting the values in .CSV format which Excel also can read and is more portable.

“Follow your bliss.” – Joseph Campbell

Re: List Control to Excel

Adam Roderick J19-Mar-10 2:48

Adam Roderick J

19-Mar-10 2:48

csv is a more generic format than xls([^]) Smile | :)

Величие не Бога может быть недооценена.

Re: List Control to Excel

mesajflaviu19-Mar-10 21:12

mesajflaviu

19-Mar-10 21:12

Adam Roderick J 09 wrote:
csv is a more generic format than xls

Yes , you are perfectly right , is much more handly and simple to export data in .csv format then .xls ! I recommend this solution !

Dialog Window Vertical Scroll Down problem

shiv@nand19-Mar-10 0:42

shiv@nand

19-Mar-10 0:42

i am using Vertical Scrollbar to the dialog window, when i scroll down with controls it works fine,but i want to reposition my dialog along with vertical scroll bar dynamically.i will reset the Vertical Scrollbar.but dialog remains unchanged.i want dailog to refresh.
eg:
SCROLLINFO si;
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_ALL;
si.nMin = 0;
si.nMax = 200;
si.nPage = 0;
si.nPos = 0;
SetScrollInfo(SB_VERT, &si, TRUE);

Re: Dialog Window Vertical Scroll Down problem

Richard MacCutchan19-Mar-10 1:30

Richard MacCutchan

19-Mar-10 1:30

I think you may need to use InvalidateRect()[^] to tell the dialog that it needs repainting.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Changing registry root from HKELY_CURRENT_USER to HKEY_LOCAL_MACHINE

maycockt19-Mar-10 0:37

maycockt

19-Mar-10 0:37

Hi,

My application reads data at startup from the registry.
By default it always goes to HKEY_CURRENT_USER in the registry, but I would like it to use HKEY_LOCAL_MACHINE.

I know I can use RegQueryValueEx and specify HKLM, but I was wondering if there is a way to set the root to be HKLM instead of HKEY_CURRENT_USER, and therefore when I call

SetRegistryKey(_T("Company\\App"));

the root will be HKLM instead of HKEY_CURRENT_USER.

TIA

Tony

Re: Changing registry root from HKELY_CURRENT_USER to HKEY_LOCAL_MACHINE

«_Superman_»19-Mar-10 0:54

«_Superman_»

19-Mar-10 0:54

From within the CWinApp derived class change the value of the variable m_pszRegistryKey.
Allocate the string on the heap because the CWinApp destructor calls free on this variable.

The recommended way of doing this is -
m_pszRegistryKey = _tcsdup(_T("HKEY_LOCAL_MACHINE\\Software\\Company\\App"));

You will need administrative privileges to make this happen.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Changing registry root from HKELY_CURRENT_USER to HKEY_LOCAL_MACHINE

maycockt19-Mar-10 1:12

maycockt

19-Mar-10 1:12

Thanks for that,

The problem I am going to encounter then is that most users of my application will not have administrative privileges and therefore won't get that level of access.
I'll have to do a code rejig and use the RegQueryValueEx functionality instead.

Thanks

Tony

Re: Changing registry root from HKELY_CURRENT_USER to HKEY_LOCAL_MACHINE

«_Superman_»19-Mar-10 1:20

«_Superman_»

19-Mar-10 1:20

If you want to write to HKEY_LOCAL_MACHINE you will anyway need administrator privileges.
If not it will be written to a key inside HKEY_CURRENT_USER.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Remote Debugging with VS2008.

Iain Clarke, Warrior Programmer18-Mar-10 23:06

Iain Clarke, Warrior Programmer

18-Mar-10 23:06

Forgive me if I'm being thick...

In VC6, I could use the Debugger Remote Connection, compile to a network share, and then when I press F5, it would run my program on the remote computer, and attach msvcmon to it. I could make break points, and all was good and simple. The only issue was to make sure the clocks agreed.

I'm trying to do the same in VS2008, and failing...

I can find how tos on attaching to a remote process, but then I can't put a breakpoint in my code.

If anyone can give me pointers, I'm sure I'm missing out on one obvious step.

Thanks,

Iain.

I have now moved to Sweden for love (awwww).

Re: Remote Debugging with VS2008.

Rajesh R Subramanian18-Mar-10 23:14

Rajesh R Subramanian

18-Mar-10 23:14

What sort of issues are you having? The breakpoints are not hit?

When it's simple, I usually compile the binaries to the network drive directly and like you said, if I press F5, it loads it from the network and breakpoints will be hit.

If it's something more complex like an ISAPI DLL that would be loaded by IIS on a remote server, then I attach my debugger to the remote process (inetinfo.exe on the server in this case) and when I load the web page, my break points will be hit (of course given I've copied the DLL to the remote machine).

“Follow your bliss.” – Joseph Campbell

Re: Remote Debugging with VS2008.

Iain Clarke, Warrior Programmer18-Mar-10 23:29

Iain Clarke, Warrior Programmer

18-Mar-10 23:29

Rajesh R Subramanian wrote:
What sort of issues are you having?

I can;t find any way of pressing f5 on one machine, and have the program run on another machine (one with msvcmon.exe running on it).

If I run it manually on the remote machine, and attach from my local machine, the any attempt to put a breakpoint in my code gets a white circle with a warning. And that's on code I breakpointed locally not long before.

As I said, I'm probably just missing one setting somewhere, and will feel silly afterwards!

Iain.

I have now moved to Sweden for love (awwww).

Re: Remote Debugging with VS2008.

KarstenK18-Mar-10 23:57

KarstenK

18-Mar-10 23:57

in the project settings -> Debugging -> Remote Debugger (Listbox above the list options)

Press F1 for help or google it.
Greetings from Germany

Re: Remote Debugging with VS2008.

Iain Clarke, Warrior Programmer19-Mar-10 0:35

Iain Clarke, Warrior Programmer

19-Mar-10 0:35

Thanks Karsten, this looks exactly like what I was missing.

Sadly, it's not playing well over my long vpn link with different domains and users at each end - But it's a reason to make a VM locally and play again.

Thanks,

Iain.

I have now moved to Sweden for love (awwww).

mfc application hangs

Abinash Mohanty18-Mar-10 22:34

Abinash Mohanty

18-Mar-10 22:34

Hi,

I have created an SDI application in which i am creating a client-server application using Socket Programming.I am connecting with multiple PCs.My application works fine if the remote PC gets connected.But when the remote PC is ShutDown the application hangs during gethostbyaddr function and takes some time to come out of it.If my client application is not running in remote PCs then it gets hang during connect function.Can anybody please help me out of this or suggest a different way to do it.Its urgent.

Thanks

Re: mfc application hangs

Mohan Ramachandra18-Mar-10 22:47

Mohan Ramachandra

18-Mar-10 22:47

Establish connection using thread AfxBeginThread . Then your main application thread won't stuck

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.