C / C++ / MFC

Re: How many rows (maximum) we can enter in a list countrl?

27-Feb-06 6:49

G Haranadh wrote:
...I am expecting the preformance will be decreased.

Then use a virtual list control instead. Used correctly, it can greatly improve performance.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

G Haranadh27-Feb-06 7:02

G Haranadh

27-Feb-06 7:02

Virtual List control? could you please tell me.

Nice talking to you. Blush | :O

If you judge people, you have no time to love them. -- Mother Teresa

Re: How many rows (maximum) we can enter in a list countrl?

David Crow27-Feb-06 7:14

Re: How many rows (maximum) we can enter in a list countrl?

27-Feb-06 7:14

G Haranadh wrote:
Virtual List control? could you please tell me.

See examples here.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

toxcct27-Feb-06 4:57

27-Feb-06 4:57

regarding the index type (int), you might have about 2 147 483 647 (2³² / 2 - 1) or more items on a list...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.24][3.0 soon...]

Are you all...

Eytukan27-Feb-06 5:23

Eytukan

27-Feb-06 5:23

Are you all from Itally

VuNic

toxcct27-Feb-06 5:25

27-Feb-06 5:25

i don't get you ???

why should i be from Italy ?

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.24][3.0 soon...]

Eytukan27-Feb-06 5:31

Eytukan

27-Feb-06 5:31

i'm not from ITALY, are you from ITALY..? get me now?;)

VuNic

toxcct27-Feb-06 5:37

27-Feb-06 5:37

erf, i've just understood the trick with italy/italic...
lol

well, i let you guess where i'm from Wink | ;)

sure you can find Cool | :cool:

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.24][3.0 soon...]

Eytukan27-Feb-06 5:43

Eytukan

27-Feb-06 5:43

looking at your bright orange color, i'm sure you are from Holland. Roll eyes | :rolleyes:

VuNic

toxcct27-Feb-06 5:44

Serialize a double floating point number

27-Feb-06 5:44

VuNic wrote:
i'm sure you are from Holland

lost...

but i love gudda (the cheese) Roll eyes | :rolleyes:

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.24][3.0 soon...]

Federico Milano27-Feb-06 3:09

Federico Milano

27-Feb-06 3:09

Hi,

I'm implementing a binary protocol and I need to serialize a C++ double type value. I know that the VS compiler implements doubles with IEEE 754 format, but I need to ensure the portability of my code throught different compilers (and the floating point format is implementation defined). The question is if do you know any library or some function to convert a double into a stream of bytes encoded with the IEEE format. Another question is, will I have any endianess problems with IEEE floating point formats, or different endianess machines order floating point numbers the same?

Thanks,

Federico

Re: Serialize a double floating point number

Nick_Kisialiou27-Feb-06 19:36

Nick_Kisialiou

27-Feb-06 19:36

I had a similar problem once. It looks like there was this big/little-endian problem for data representation. At least I did not crack it, I just found a simpler solution which was good enough. What I did was : convert a double value into a string, send it as a text string and convert it back on the remote computer. String-numeric conversion functions are common.

I hope it helps.

Nick

control over system

rajeevktripathi27-Feb-06 1:31

rajeevktripathi

27-Feb-06 1:31

Hi all

As when system is switched on, and we press del key then instead of operating system load we enter into setup.

I also need to do same, that means, when system is started to on and if press any key (any one of the key), then Operating system loading should be halted. and my application should run.

Please guide me,
Thanks

David Crow27-Feb-06 2:44

27-Feb-06 2:44

rajeevktripathi wrote:
As when system is switched on, and we press del key then instead of operating system load we enter into setup.

This is happening at the BIOS level. Before Windows is loaded into memory, the POST code is executed.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Maximilien27-Feb-06 2:44

Maximilien

27-Feb-06 2:44

well, methink, you cannot do this easilly; when pressing "del" it will go to the computer's bios, it's not an ordinary program.

what exactly do you want to do that you don't want the Operating System loaded ?

Maximilien Lincourt
Your Head A Splode - Strong Bad

Dennis Gourjii27-Feb-06 3:01

Dennis Gourjii

27-Feb-06 3:01

What exactly do you want to do that you don't want the Operating System<br />
loaded?

A rethorical question indeed! Sure thing: to rip off Windows password from a colleague's PC Big Grin | :-D

Yet another list view problem

Blake Miller1-Mar-06 9:44

Blake Miller

1-Mar-06 9:44

Really? But that implies Windows is loading, and you can replace the GINA to do that. I think he wanted to intercept even the loading of Windows.
He could rewrite the boot loader on the disk with something else, and then choose between Windows and another OS possibly.

People that start writing code immediately are programmers (or hackers), people that ask questions first are Software Engineers - Graham Shanks

Waldermort27-Feb-06 1:27

Waldermort

27-Feb-06 1:27

Messages from List view controls are sent in the form of WM_NOTIFY, no problem catch the message perform the action. Until the messages that MSDN are talking about are not being sent.

case WM_NOTIFY:
    switch(LOWORD(wParam))
    {
        case IDC_LIST:
            if(((LPNMHDR)lParam)->code == NM_CLICK) {
                // this works
            }
            if((((LPNMHDR)lParam)->code == NM_DBLCLK)||
                (((LPNMLVKEYDOWN)lParam)->wVKey == VK_SPACE)||
                (((LPNMLVKEYDOWN)lParam)->wVKey == VK_RETURN)||
                (((LPNMHDR)lParam)->code == NM_RETURN)||
                (((LPNMLVKEYDOWN)lParam)->wVKey == VK_RIGHT)) {
                    // Both VK_RETURN & NM_RETURN dont work
            }
            else if(((LPNMLVKEYDOWN)lParam)->wVKey == VK_LEFT) {
                // this works
            }
        break;
    }
break;

When the Enter key is pressed, nothing happens, yet the directions and space bars do. I'm pretty sure there is nothing wrong with the above code. Also another little annoyance is there is no KEYUP, I want to perform an action when a new item is selected using the direction keys. As it stands I would have to pass the selected item to the function, instead of letting the function handle it.

Re: Yet another list view problem

Naveen27-Feb-06 1:53

Naveen

27-Feb-06 1:53

i tried out ur code. Its working pretty out here.
But when i added a default button on to the control, it stops getting the VK_RETURN message . Please check it out whether this is because of any buttons on the dialog.

nave

Re: Yet another list view problem

Waldermort27-Feb-06 2:05

Waldermort

27-Feb-06 2:05

Yes I have two buttons on the dialog. I read somewhere that having an ID_OK can cause problems, so I changes the id to ID_BUTTON_OK and set it to 1023. I have also read that the message mapping needs to be changed, but I'm not quite sure how to accomplish this. Here is my Winmain

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
	LPSTR lpCmdLine, int nCmdShow)
{
	INITCOMMONCONTROLSEX InitCtrlEx;

	InitCtrlEx.dwSize = sizeof(INITCOMMONCONTROLSEX);
	InitCtrlEx.dwICC  = ICC_BAR_CLASSES;
	InitCommonControlsEx(&InitCtrlEx);

	g_hinst = hInstance;

	return DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, DlgProc);
}

I'm used to creating controls at runtime, this is my first time to use a resource dialog.

Re: Yet another list view problem

Waldermort27-Feb-06 3:11

Waldermort

27-Feb-06 3:11

As a temporary solution I added some extra code into the dialogs defualt button process. But I would be interested in how to solve this. I have read many questions about the same thing all over the web, either there are no answers or they are MFC related.

Image in arc file

rajeevktripathi27-Feb-06 1:24

rajeevktripathi

27-Feb-06 1:24

HI I want to take the image of disk or drives and wanna image to be an arc file.
So please tell me that how can I compress the disk or drive image to arc file.

Please guide me.
Thanks

How to check valid internet connection?

Aryan S27-Feb-06 0:15

Aryan S

27-Feb-06 0:15

I am trying to check whether a machine has valid internet connection or not, in MFC code. Can you please tell how to do that?
Thanks in advance,

Re: How to check valid internet connection?

Nibu babu thomas27-Feb-06 0:44

Nibu babu thomas

27-Feb-06 0:44

InternetGetConnectedState(...)

Nibu thomas
Software Developer

Re: How to check valid internet connection?

David Crow27-Feb-06 2:46