C / C++ / MFC

Re: behavior of strlen() modified

12-Mar-08 5:47

koumodaki wrote:
Since I am using strlen() to ge the buffer size

buffer size and string len cannot interpretted same.

koumodaki wrote:
As far as I know only memory is alocatd by the compiler when I define the array

size of array is the buffer size here.

koumodaki wrote:
So can I safetly assume that the variable len = 6, the size of decalred array?

yes, but if your regvalue string length is greater than 5 you won't get the complete string.

koumodaki12-Mar-08 5:54

koumodaki

12-Mar-08 5:54

Thanks

Re: behavior of strlen() modified

C^hris L^osinger12-Mar-08 8:16

C^hris L^osinger

12-Mar-08 8:16

koumodaki wrote:
I wanted to know the side-effects of using the function this way.

high probability of an Access Violation error, followed by a nasty dialog box and the termination of your application.

image processing toolkits | batch image processing

Query about Tray Icon

ramana.g12-Mar-08 5:16

ramana.g

12-Mar-08 5:16

Hi all,
I have developed a dialog based application. In CMyDialog::OnInitDialog() i wrote code to add TrayIcon.

HICON hIcon = NULL;
m_NotifyIconData.cbSize = sizeof(NOTIFYICONDATA);
m_NotifyIconData.hWnd = m_hWnd;
m_NotifyIconData.uID = IDR_MAINFRAME;
m_NotifyIconData.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
m_NotifyIconData.uCallbackMessage = ID_TRAY_MESSAGE; //WM_USER + 1
hIcon = (HICON) LoadIcon(AfxGetInstanceHandl(),MAKEINTRESOURCE (IDR_MAINFRAME));
m_NotifyIconData.hIcon = hIcon;
strcpy(m_NotifyIconData.szTip, "My Tray Icon");
Shell_NotifyIcon(NIM_ADD, &m_NotifyIconData);
if (hIcon)
DestroyIcon(hIcon);

It successfully added Tray Icon to the Notification area.

My sample application is running well. But, when i kill windows "explorer.exe" process from task manager and start "explorer" again, TrayIcon is missing in Notification area. I want Tray icon to be added again in this scenario. How to do this?

Thank you...

Re: Query about Tray Icon

David Crow12-Mar-08 5:44

David Crow

12-Mar-08 5:44

ramana.g wrote:
How to do this?

By reading this article.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Query about Tray Icon

ramana.g12-Mar-08 6:00

ramana.g

12-Mar-08 6:00

thank you David Smile | :)

How to count no. of folders in a directory?

vandana712-Mar-08 5:15

vandana7

12-Mar-08 5:15

Hello
Can i get help to count no. of folders in a directory.

Justin Perez12-Mar-08 5:17

Justin Perez

12-Mar-08 5:17

Yes, you may. I have 10 fingers and 10 toes. What are you working with?

I'm going to become rich when I create a device that allows me to punch people in the face over the internet.

"If an Indian asked a programming question in the forest, would it still be urgent?" - John Simmons / outlaw programmer

Mark Salsbery12-Mar-08 5:22

Mark Salsbery

12-Mar-08 5:22

You could use FindFirstFile()/FindNextFile() and count only files with the FILE_ATTRIBUTE_DIRECTORY
attribute.

The code could be similar to this[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

ptr_Electron12-Mar-08 5:59

12-Mar-08 5:59

int iCountDir=0;
BOOL bWorkingff = Finderff.FindFile("*.*");
bWorkingff = Finderff.FindNextFile();

while(bWorkingff)
{
if (Finderff.IsDirectory()==TRUE)
iCountDir++;

bWorkingff = Finderff.FindNextFile();
}

Finderff.Close()

// iCountDir --Use it now

Hamid_RT12-Mar-08 7:46

Hamid_RT

12-Mar-08 7:46

See DlgDirList.

RAM disk driver for windows 2000 onwards.

ThatsAlok1-Apr-09 19:04

ThatsAlok

1-Apr-09 19:04

Hamid. wrote:
DlgDirList

does that return no of Directory in the folder?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

vikramlinux12-Mar-08 4:53

vikramlinux

12-Mar-08 4:53

Hi Friends,
I am looking for RAM Disk Driver for windows. Is it provided by microsoft itself or do I need to write my own ?

Re: RAM disk driver for windows 2000 onwards.

Iain Clarke, Warrior Programmer12-Mar-08 5:04

Iain Clarke, Warrior Programmer

12-Mar-08 5:04

I did a google search for "ram disk 2000".

1st hit was to build your own driver, from microsoft.

3rd hit was a blog descibing various ram disks, with pros and cons.

Iain.

Iain Clarke appears because ^CPallini still cares.

Re: RAM disk driver for windows 2000 onwards.

vikramlinux12-Mar-08 19:42

vikramlinux

12-Mar-08 19:42

I know that we can build our own driver. But I wanted to check whether I can have already developed driver and if so what are possible options.

Re: RAM disk driver for windows 2000 onwards.

Maxwell Chen12-Mar-08 19:52

Maxwell Chen

12-Mar-08 19:52

This one?

Free RamDisk for Vista/XP/2000/2003[^]

Maxwell Chen

Segment selected region from the video frames

ptr_Electron12-Mar-08 3:17

12-Mar-08 3:17

Friends,I want to Segment selected region from the video frames, Say from the video frame 1 I selected an actor with no of mouse clicks(to identify the region boundry) manually, I am looking for good and algorithm/Fram Work which can segment it from the bacground or which can set all the pixel except the actor to white in all the rest of the frames
(C++ / C# or any..)
any smart idea pls

Thanx

Rajkumar R12-Mar-08 3:42

12-Mar-08 3:42

work with WIN32 or GDI+ regions.

Create two region
1) Rectangular Frame Region (CreateRectRgn)
2) Segment Selected Region (CreatePolygonRgn)

Get the difference of region
CombineRgn(Frame, segment, RGN_DIFF)

Load the image to HDC
Then fill the difference region with FillRgn() of your choice color.

alternatively you can use SelectClipRgn() to clip the portion when you draw.

ptr_Electron12-Mar-08 5:46

12-Mar-08 5:46

Thank you for responce, Well.. Filling the difference (RGN) will not segment the object from the bacground, For Example if a sequence of video frames contains a person walking in a forest, I want only walking person, to be in all the frames, Fill the rest of the region(forest) with some color.

Thanks

Rajkumar R12-Mar-08 5:55

12-Mar-08 5:55

ptr_Electron wrote:
Fill the rest of the region(forest) with some color.

and

ptr_Electron wrote:
Filling the difference (RGN)

is this the same.

BTW, this works by the assumption that you find the region of the person manually (as you specified) in each frame.

ptr_Electron wrote:
Filling the difference (RGN) will not segment the object from the bacground

what is the difference region, it is the background, if you fill the difference region it is filling the background.

ptr_Electron12-Mar-08 6:04

12-Mar-08 6:04

Thanks for responce...but there is some displacement(any direction) in the forground and bacground object(rgn) also, in the next comming frames.. so I not quite clear... by the way May I know what BTW is..

Rajkumar R12-Mar-08 6:10

12-Mar-08 6:10

ptr_Electron wrote:
but there is some displacement(any direction) in the forground and bacground object(rgn) also

This requires some thing like "motion detection", i don't have experience in this. search and let others respond to it.

see also.
Motion_Detection[^]

ptr_Electron wrote:
by the way May I know what BTW is..

By the Way

ptr_Electron12-Mar-08 22:41

Select ListView Control`s item

12-Mar-08 22:41

Ok Thanks you very much

bhat12-Mar-08 3:01

bhat

12-Mar-08 3:01

Hi
Win32 API in VC++ using VS6!
I am using ListView Control in my program .......everything is working fine......but the problem is when i select the Ist item the whole line(i.e Row) should get selected .....but it select only the item at Ist Row & Ist Column......

tell me how to do it

AbidBhat

Re: Select ListView Control`s item

Rajkumar R12-Mar-08 3:24