Re: RegQueryValueEx - C / C++ / MFC Discussion Boards

Re: Message Map Handlers

Stuart Dootson19-Mar-09 8:25

Stuart Dootson

19-Mar-09 8:25

ForNow wrote:
I could code ON_MESSAGE(ID_OK,my_ok_response) to process this message

No you couldn't - should use ON_COMMAND(ID_OK, my_ok_response) to process that.

ForNow wrote:
Where I can code the SDK message e.g WM_CLOSE as the first parm and my method to handle this as the second ???

use ON_MESSAGE(WM_CLOSE, myCustomCloser) where myCustomCloser has the signature

LRESULT myCustomCloser(WPARAM, LPARAM);

in your window class.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Message Map Handlers

ForNow19-Mar-09 12:15

ForNow

19-Mar-09 12:15

So ON_MESSAGE is for Windows system messages whereas ON_COMMAND is for anyhting thats WM_USER + .....

thankx

Re: Message Map Handlers

Stuart Dootson19-Mar-09 12:35

Stuart Dootson

19-Mar-09 12:35

ForNow wrote:
So ON_MESSAGE is for Windows system messages

Yes

ForNow wrote:
ON_COMMAND is for anyhting thats WM_USER + .....

No - if you look at the definition of the ON_COMMAND macro, you'll see this:

#define ON_COMMAND(id, memberFxn) \
	{ WM_COMMAND, CN_COMMAND, (WORD)id, (WORD)id, AfxSigCmd_v, \
		static_cast<AFX_PMSG> (memberFxn) },
		// ON_COMMAND(id, OnBar) is the same as
		//   ON_CONTROL(0, id, OnBar) or ON_BN_CLICKED(0, id, OnBar)

What this means is that ON_COMMAND handles the WM_COMMAND[^] message, which (to quote that page) is sent when the user selects a command item from a menu, when a control sends a notification message to its parent window, or when an accelerator keystroke is translated.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Message Map Handlers

ForNow19-Mar-09 17:05

ForNow

19-Mar-09 17:05

thankx

RegQueryValueEx

siva45519-Mar-09 6:35

siva455

19-Mar-09 6:35

Hi,
Please give me a sample to use RegQueryValueEx()..and i want to store the value in a CString..Please help me out.. as im a beginner..

Re: RegQueryValueEx

CPallini19-Mar-09 7:26

CPallini

19-Mar-09 7:26

You may find sample code in the RegQueryValueEx documentation page [^].
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: RegQueryValueEx

Mattias G19-Mar-09 13:28

Mattias G

19-Mar-09 13:28

Yes, there's a useful sample on that page, if you're interested in getting a data object with an unknown size. But if you want to read a C string and convert that string to a CString, you are probably better off with this:

<br />
BOOL ReadStringFromMysterioiusOSSource(char* destination, int maxChar);<br />
<br />
// ...<br />
<br />
CString myValue;<br />
char buf[438];<br />
ReadStringFromMysterioiusOSSource(buf, 438);<br />
myValue = buf;<br />

(If you really need to use a OS function, just use the CString's assignment operator)

Re: RegQueryValueEx

CPallini19-Mar-09 22:28

CPallini

19-Mar-09 22:28

API for getting the MAC address of the LAN card using c or c++

optical12319-Mar-09 6:08

optical123

19-Mar-09 6:08

Dear all

Is there any API to get MAC address of the LAN card used (more the one network we need to find MAC address for give IP address) at client side(system).system may contain more than one network card and also more than one network may conncet

plz help me

thanks in advance

Regards
sunny

Re: API for getting the MAC address of the LAN card using c or c++

David Crow19-Mar-09 6:31

David Crow

19-Mar-09 6:31

Have you looked into GetAdaptersInfo()?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: API for getting the MAC address of the LAN card using c or c++

optical12319-Mar-09 18:41

optical123

19-Mar-09 18:41

hey

GetAdaptersAddresses() function is better than GetAdaptersInfo()

Regards
Sunny Smile | :)

radio button in a propertysheet

Rakesh519-Mar-09 2:52

Rakesh5

19-Mar-09 2:52

hi folks, yesterday i was not clear on my doubt. Sorry about that.

Here is my doubt:

i have a propertysheet which has three propertypages.Out of the three, one propertypage will contain the other two propertypages inside it.
click the link for Sample Application:
http://www.codeguru.com/cpp/controls/propertysheet/article.php/c595/[^]

If i insert a radio button in the third propertypage (which has two propertypages inside it), the application got struck. how can i resolve it?

thanks,

rakesh

Re: radio button in a propertysheet

David Crow19-Mar-09 3:08

David Crow

19-Mar-09 3:08

Rakesh5 wrote:
...the application got struck.

Does this mean something?

Re: radio button in a propertysheet

led mike19-Mar-09 4:14

led mike

19-Mar-09 4:14

DavidCrow wrote:
Does this mean something?

Yes. He was hoping to find someone that gives a struck. Poke tongue | ;-P

Re: radio button in a propertysheet

Michael Schubert19-Mar-09 3:15

Michael Schubert

19-Mar-09 3:15

With so little information, nobody will be able to help you.

Have you ever used a debugger? Visual Studio has one built in!

Re: radio button in a propertysheet

#realJSOP19-Mar-09 3:33

#realJSOP

19-Mar-09 3:33

Are you a real person, or is this some new fangled kind of Turing test?

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: radio button in a propertysheet

Michael Schubert19-Mar-09 3:36

Michael Schubert

19-Mar-09 3:36

Wow, that post in the Lounge worked!

Re: radio button in a propertysheet

#realJSOP19-Mar-09 4:53

#realJSOP

19-Mar-09 4:53

I guess I'm kinda like Batman - when the Bat Signal is displayed, I'll see it and come to the rescue. Smile | :)

Re: radio button in a propertysheet [modified]

Code-o-mat19-Mar-09 3:43

Code-o-mat

19-Mar-09 3:43

When your program "gets stuck", use the PAUSE icon on visual studio to see where the program execution is in your code. YOu can then use the "Step into", "Step Over" and "Step out" methods to see what your proggie is doing.
Also, check the following: your first radio button in your radio button group should have the WS_GROUP style on it, also, the next control in the tab order that comes right after the last radio button in the group should also have the WS_GROUP style. If your property pages are created from dialog resources made in visual studio's dialog editor, make sure that they have the "Control Parent" and "Control" styles set.
Do any of these help?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

modified on Thursday, March 19, 2009 10:59 AM

Re: radio button in a propertysheet

Steve Mayfield19-Mar-09 6:26

Steve Mayfield

19-Mar-09 6:26

Microsoft has a Knowledge base article about it Q149501 "PRB: Child CPropertySheet Hangs If Focus Is Switched" [^]

Steve
_________________
I C(++) therefore I am

Re: radio button in a propertysheet

«_Superman_»19-Mar-09 19:10

«_Superman_»

19-Mar-09 19:10

UI design is very tricky and can get quite complicated.
And this is not going to sell.
You need to change it.

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

Doubt in function pointer

Cool_Phillip19-Mar-09 2:42

Cool_Phillip

19-Mar-09 2:42

Hi All
I'm getting some error in below code. can any body tell me whats is the proboem in my code?

Test.h
---------------
class Test
{

private:
int i , j;

public:
//f pointer
int f1(int i, int j);
int f2(int i, int j);
int (*fptr)(int,int);

};

Test.cpp
-----------------
int Test::f1(int i, int j)
{
int res = i+j;
cout<<"IM IN f1 : Reult "<<res<<endl;
return res;
}
int Test::f2(int i, int j)
{
int res = i-j;
cout<<"IM IN f2 : Reult "<<res<<endl;
return res;
}

main.cpp
------------
int main()
{

Test obj;

int (*fptr)(int,int) ;
fptr = &(Test::f1);
fptr(2,1);

return 0;
}

Actually im getting error in fptr = &(Test::f1); line
i.e Error 1 error C2440: '=' : cannot convert from 'int (__thiscall Test::* )(int,int)' to 'int (__cdecl *)(int,int)' c:\documents and settings\e_skanun\my documents\visual studio 2005\projects\test\test\main.cpp 35

And im nt able to correct.
plz do help.

Regards
Phillip

Regards
Phillip

Re: Doubt in function pointer [modified]

Cedric Moonen19-Mar-09 2:58

Cedric Moonen

19-Mar-09 2:58

Global functions and class member functions do not have the same signature: for a function member of a class, the this pointer is passed implicitely to identify the instance of the class on which the function is called.
~~What you are trying to do there is store a pointer to a member function in a pointer to a global function. So, that's why the compiler complains that you cannot do that.~~

EDIT: oops, I misread your code sorry. David's answer is correct.

Cédric Moonen
Software developer

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

modified on Thursday, March 19, 2009 9:07 AM

Re: Doubt in function pointer

David Crow19-Mar-09 2:59

David Crow

19-Mar-09 2:59