C / C++ / MFC Discussion Boards

gracias_carol27-Dec-02 1:58

27-Dec-02 1:58

Hi i am working for a project where i need to provide an option of customization of the application to the user with only providing him the object file ( no source code will be given to user) all he need to do is start the customization utility and simply browse through some options and can get the executable as per his needs, i need to know any idea in order to achieve it.

urgent replies will be deeply appreciated.

thanks
gracias

gracias carol

What kind of customization?

AlexO27-Dec-02 4:04

AlexO

27-Dec-02 4:04

gracias_carol wrote:
can get the executable as per his needs,

What does it mean?

Re: What kind of customization?

gracias_carol29-Dec-02 23:07

gracias_carol

29-Dec-02 23:07

IT simply means the cusomization of the features given to the customer , suppose that my executable provides a list of features and he is only interested in some of those features and he want to change the look and feel of the product , so all i need to give him a smart tool by which he can select the available options or add if he wants and can change the look and feel of it .

can it be achieved by using some sort of configuration file , or and XML file if yes then do let me know how do go ahead for it.

waiting for an urgent reply
thanks
gracias

gracias carol

ifstream and skipws

georgiek5027-Dec-02 1:15

georgiek50

27-Dec-02 1:15

When you use the >> operator when reading a file I noticed spipws is there by default. I open the file using File.open("file.txt"). How can I modify this so I can include the whitespace?

Re: ifstream and skipws

Taka Muraoka27-Dec-02 1:24

Taka Muraoka

27-Dec-02 1:24

unsetf( ios::skipws )

he he he. I like it in the kitchen! - Marc Clifton (on taking the heat when being flamed)

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Help me to Release Resources!

HellShrimp4free27-Dec-02 0:23

HellShrimp4free

27-Dec-02 0:23

hi i want to help me to release the graphical recources and the Device context in the code below
Unsure | :~

CFont cf;<br />
  	    cf.CreateFont(16,0,0,0,FW_BOLD|FW_EXTRALIGHT,0,0,0,DEFAULT_CHARSET,OUT_CHARACTER_PRECIS,CLIP_CHARACTER_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH|FF_DONTCARE,"Arial");<br />
<br />
		CBitmap b;<br />
		b.LoadBitmap(IDB_BITMAP1);<br />
<br />
		BITMAP bm;<br />
		b.GetObject(sizeof(BITMAP),&bm);<br />
<br />
	        CClientDC h(cw[n]);<br />
			<br />
		CDC *dc=new CDC;<br />
		dc->CreateCompatibleDC(&h);<br />
		dc->SelectObject(&b);<br />
        				<br />
		h.SetTextColor(RGB(10,50,220));<br />
		h.SelectObject(cf);<br />
		<br />
<br />
		h.BitBlt(0,0,bm.bmWidth,bm.bmHeight,dc,0,0,SRCAND);<br />
		dc->DrawText(Int2CString(cw_key[n]),CRect(2,5,25,25),DT_CENTER);<br />
		h.BitBlt(0,0,bm.bmWidth,bm.bmHeight,dc,0,0,SRCAND);<br />
						<br />

i write this below code to release them but it seems that i forget something to release .because program will become very Slow after 1 or 2 mintue. Confused | :confused:

cf.DeleteObject();<br />
		b.DeleteObject();<br />
		dc->DeleteDC();

when i write : h.DeleteDC(); an error will Occure --> Unhandled exception at 0x77f767cd in MASTER.exe.
i dunno why.

thanks for your help

Re: Help me to Release Resources!

Mike Nordell27-Dec-02 1:05

Mike Nordell

27-Dec-02 1:05

HellShrimp4free wrote:
when i write : h.DeleteDC(); an error will Occure

Don't do that. The destructor of CClientDC will take care of it.

What you however should do is either
delete dc;
or put that CDC on the stack, not on the heap.

Globals and condition compilation

georgiek5026-Dec-02 22:39

georgiek50

26-Dec-02 22:39

I have written a program than spans six cpp file all of which share class information which is located in one header file. I am having a problem organizing my code concerning the global class objects. Each cpp file has it's own header file and depeding on the source code file some header files are nested etc...I would like to organize the program better and do not want to put extern class... at the beginning of each source file. How can I get around this problem? #ifndef-#endif seems could be the way to go but I can't quite get it without link errors. If someone could help out I would be greatful. Thanks.

Re: Globals and condition compilation

Roger Allen27-Dec-02 0:05

Roger Allen

27-Dec-02 0:05

Put all the extern statements into a .h file of their own and have all the .cpp file include this file. Only one place needs to be updated for all .cpp files to be updated.

Roger Allen
Sonork 100.10016

This is a multiple choice question, choose wisely
Why did the hedgehog cross the road?
A: To show he had guts?
B: To see his flat mate?

Re: Globals and condition compilation

georgiek5027-Dec-02 1:14

georgiek50

27-Dec-02 1:14

Thanks, that did it!

Memory Address Interpretation

Dominik Reichl26-Dec-02 22:20

Dominik Reichl

26-Dec-02 22:20

Hello,

yesterday I've found a nice manual on memory addresses. A part:

--------K-M00400017--------------------------
MEM 0040h:0017h - KEYBOARD - STATUS FLAGS 1
Size:	BYTE
SeeAlso: MEM 0040h:0018h,INT 16/AH=02h,MEM 0040h:0096h

Bitfields for keyboard status flags 1:
Bit(s)	Description	(Table M0010)
 7	INSert active
 6	Caps Lock active
 5	Num Lock active
 4	Scroll Lock active
 3	either Alt pressed
 2	either Ctrl pressed
 1	Left Shift pressed
 0	Right Shift pressed
SeeAlso: #M0011,#00587

Now my question: How can I read this byte?
I tried this code:

unsigned char uTemp;
unsigned char *pNull = NULL;
uTemp = pNull[0x00400017];

char szTemp[32];
sprintf(szTemp, "%02X", uTemp);
MessageBox(GetDesktopWindow(), szTemp, "clock", NULL);

But it always prints "00", zero. But numlock is on! Therefor I think i misinterpret the address.

Whats the correct memory address for pNull[] to read from? How must I convert the "0040h:0017h"? Confused | :confused:

Thank you!
-Dominik

Re: Memory Address Interpretation

Joaquín M López Muñoz26-Dec-02 22:34

Joaquín M López Muñoz

26-Dec-02 22:34

This seems 16-bit addresses. You cannot happily inspect those addresses in Win32 protected mode, so I guess what you're inspecting is just a random location into the virtual memory space of the program.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Memory Address Interpretation

Dominik Reichl27-Dec-02 0:29

Dominik Reichl

27-Dec-02 0:29

And how can I then read these 16-bit addresses?

It must be possible. Or how do other system information programs get advanced information about the BIOS (more than the 4 information strings in the registry)...?

Re: Memory Address Interpretation

Mike Nordell27-Dec-02 1:12

Mike Nordell

27-Dec-02 1:12

Dominik Reichl wrote:
How can I read this byte?

From Win32? You can't. You needing ring0 privs (i.e. kernel-mode device driver).

But why would you want direct hardware access when GetKeyState, GetAsynchKeyState and GetKeyboardState can give you the same info?

Re: Memory Address Interpretation

Dominik Reichl27-Dec-02 3:43

Dominik Reichl

27-Dec-02 3:43

I am currently developing a system information tool and there I need BIOS information (more than the 3 string values in the registry).

The keystate access was just thought as an example. There are many other, more interesting, values in this memory section.

Do you know how other system information programs get this information? For example, how do I detect, if the installed BIOS is flashable?

Thank you
-Dominik

GetView FROM OnNewDoucment()

Hockey26-Dec-02 22:08

Hockey

26-Dec-02 22:08

I have some dialog controls inside an CFormView derived dialog and I need to clear them when the user selects New from file menu or when CDocument::OnNewDocument() is called.

How can I do this?

Thanks Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: GetView FROM OnNewDoucment()

super26-Dec-02 22:17

super

26-Dec-02 22:17

Can u be more clear..??
Is this Document and ur Fromview related ....
OnNewDocument() which view is created? or u want to show existing view...
Is this SDI or MDI....
Canu be more specific

cheers,
Super
------------------------------------------
Too much of good is bad,mix some evil in it

Re: GetView FROM OnNewDoucment()

pba_27-Dec-02 8:06

pba_

27-Dec-02 8:06

You can use CDocument::UpdateAllViews to send an update message to all the views which are attached to your doc.

handling multiple frame windows

Thanh Ly26-Dec-02 21:31

Thanh Ly

26-Dec-02 21:31

I'm trying to use multiple CFrameWnd objects in addition to my main window. CMainFrame is my main window class create by App Wizard. I later created another subclassed CFrameWnd but I want it to be a child window of CMainFrame. I've only been able to get it to work properly if I create this child window using the "new" operator.

From my basic knowledge of C++, it is best to delete objects allocated with the new operator once we're done with the object. When should I use delete in this scenario? One of my attempts was to add a pointer to my subclass (call it CMyChildFrmWnd) as a public member variable in CMainFrame (m_myChildFrmWnd). I override CMainFrame::OnDestroy() which is just a message handler and not the Destroy() function itself, and in OnDestroy() I do:

if(m_myChildFrmWnd)
{
delete(m_myChildFrmWnd);
m_myChildFrmWnd = NULL;
}

Doing this causes an Access Violation error (0xC0000005).
If I don't manually delete this pointer allocated by using the new operator, will the memory consumed be freed automatically when the program exits? Is it going to be a problem if I keep creating new instances of CMyChildFrmWnd over and over again throughout the lifetime of the program's execution? For example, every time the user clicks a button:

m_myChildFrmWnd = new CMyChildFrmWnd;

Any suggestions on how to handle this or a better way of creating multiple frame windows? I would prefer not to use MDI child windows.

Re: handling multiple frame windows

Joaquín M López Muñoz26-Dec-02 21:39

Joaquín M López Muñoz

26-Dec-02 21:39

CFrameWnds auto delete on destroy time, so you mustn't delete them explicitly: they will clean up when the user closes them or programmatically with m_myChildFrmWnd->DestroyWindow().

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: handling multiple frame windows

Thanh Ly26-Dec-02 21:47

Thanh Ly

26-Dec-02 21:47

Thanks for the quick reply.

How to define the full path of my application

julych26-Dec-02 20:14

julych

26-Dec-02 20:14

How can I define the full path of my application(exe file) in order to check it's location in the PC every time it is started? Is there SDK or MFC function about this?

Re: How to define the full path of my application

Joaquín M López Muñoz26-Dec-02 20:22

Joaquín M López Muñoz

26-Dec-02 20:22

Use GetModuleFileName with hModule==NULL.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Class in Visual C++ !!

HellShrimp4free26-Dec-02 19:56

HellShrimp4free

26-Dec-02 19:56

i have a little problem.
my project name is MASTER. and in this project there are some class such as CMASTERView.
i defined some Public Variable in CMASTERView class(for example w1,w2,w3)

then i defined a class with this name : TREE. i do this with ADD CLASS option.
even i want to use w1 or w2 or w3 in class TREE an error occures : "w1" undeclared indentifier
what can i do if i want to use those tree variables in Class TREE ? Blush | :O

thnx

Re: Class in Visual C++ !!

super26-Dec-02 21:29

super

26-Dec-02 21:29

Well I really fully understand what u wanted to say..Anyway i will try to clear with what i have understood..
What is the relation between TREE class and CMasterview Class..If there no relation then that varibale will be out of scope only...

cheers,
Super
------------------------------------------
Too much of good is bad,mix some evil in it

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