Re: Image selection - C / C++ / MFC Discussion Boards

Checking if a user is in a group

kelprinc29-Jan-06 21:12

kelprinc

29-Jan-06 21:12

Does anybody know how to check if a user is part of a WINNT group.

Re: Checking if a user is in a group

David Crow30-Jan-06 3:25

David Crow

30-Jan-06 3:25

Sure, but you did not specify whether the group was local or global. Check out NetLocalGroupGetMembers() or NetGroupGetUsers().

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: Checking if a user is in a group

kelprinc30-Jan-06 3:30

kelprinc

30-Jan-06 3:30

Let me try it. I want to check both local and global groups.
I have spent the whole day struggling

Kelvin Chikomo

detecting file access

_kane_29-Jan-06 20:41

_kane_

29-Jan-06 20:41

sometimes it so happens that a process is accessing a file and it makes it uneditable or undeleteable. Is there a way by which we can detect which process is accessing the file? that way we could possibly kill it to enable file edition.

kane

"Some guys hack just to get themselves a girlfriend.What a pathetic reason huh ?"

Re: detecting file access

Stephen Hewitt29-Jan-06 21:41

Stephen Hewitt

29-Jan-06 21:41

Look Here [^]. Look for "Handle" under "Processes & Threads". These guys are geniuses.

Steve

Re: detecting file access

_kane_29-Jan-06 21:48

_kane_

29-Jan-06 21:48

great tool, but they are not giving the source code for this software, neither explaining how they are doing it...i need to know how it is done.

Thanks for your help, anyway Smile | :)

kane

"Some guys hack just to get themselves a girlfriend.What a pathetic reason huh ?"

Image selection

_anil_29-Jan-06 20:31

_anil_

29-Jan-06 20:31

Hi I am doing some Image processiong stuff.
I draw a Region of interest(ROI) over the image using mouse. freehand drawing.
now I want to know how to find out if a point is inside that region? any algorithm please suggest?
In case of Rectangular ROI there is no problem. I am not able to get algorithm for freehand image area.

I need your help. Confused | :confused:

Anil

Re: Image selection

PJ Arends29-Jan-06 20:47

PJ Arends

29-Jan-06 20:47

Save the points as you draw the ROI, use CreatePolygonRgn() to create a HRGN from those points, use PtInRegion() to determine if a point is inside your ROI.

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-- modified at 2:48 Monday 30th January, 2006

Re: Image selection

_anil_29-Jan-06 20:55

_anil_

29-Jan-06 20:55

Hi Thank you very much
I am waiting for a reply.
I am going to implement your method. I will let you know it it works.
And hope to help me if I will stuck some where.

Thankx again.

Regards
Anil.

Re: Image selection

_anil_29-Jan-06 21:37

_anil_

29-Jan-06 21:37

Hi Thank you very much.
I am able to get the result.

Regards
Anil

How to transfer IStream into IDataObject

saravana pandy29-Jan-06 20:23

saravana pandy

29-Jan-06 20:23

HAI,
I am not able to put the IStream generated by me into the IDataObject.Here is the code snippet can anyone point out where i am going wrong?
IStream *lpStream = NULL;
//Put some data into IStream
LPDATAOBJECT pDO = new LPDATAOBJECT();
//FORMATETC definition
FORMATETC *fmtetc = new FORMATETC ;//= {0};
fmtetc->cfFormat = CF_TEXT;
fmtetc->dwAspect = DVASPECT_CONTENT;
fmtetc->lindex = -1;
fmtetc->tymed = TYMED_ISTREAM;
fmtetc->ptd = NULL;
//STGMEDIUM definition
STGMEDIUM *medium = new STGMEDIUM ;
medium->tymed =TYMED_ISTREAM;
medium-> pstm = lpStream;
lpStream->AddRef();
medium->pUnkForRelease = NULL;
//I get error in this line.
pDO->SetData(fmtetc,medium,TRUE);

Can anyone tell me what i should do before calling the setData()?
Thanks in advance.

Saravana Kumar

-- modified at 2:24 Monday 30th January, 2006

what is the size of a empty class?

vikas amin29-Jan-06 20:11

vikas amin

29-Jan-06 20:11

What is the size of a empty class

If the size of the class is zero what can be the problem
with the class?

Vikas Amin
Embin Technology
Bombay

Re: what is the size of a empty class?

Owner drawn29-Jan-06 20:17

Owner drawn

29-Jan-06 20:17

vikas amin wrote:
What is the size of a empty class

1 or (>0)

vikas amin wrote:
If the size of the class is zero what can be the problem
with the class?

It cannot be zero.

Jesus Loves Rose | [Rose]

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Re: what is the size of a empty class?

Laxman929-Jan-06 21:26

Laxman9

29-Jan-06 21:26

first thing...
The size of the empty class is 1 if it doesn't contains any member variables
else its size is the total bytes required for the variables in that class.

second thing...

if the class contains atleast one virtual function then its size is 2 bytes without member variables

as the object of the class contains the address of the VTABLE.

for the existance of the object the class having minimum 1 byte size.

Thanks and Regards
Laxman

FAILURE is the first step towards SUCCESS Cool | :cool:

Re: what is the size of a empty class?

vikas amin29-Jan-06 21:56

vikas amin

29-Jan-06 21:56

Yeh i checked it IDE but the question
is why ?

For a class containing only one "char" variable the
size of the class is 1 . how???

even if the class is empty its 1 and even if it has a
character variable its one?

Vikas Amin
Embin Technology
Bombay

Re: what is the size of a empty class?

Laxman930-Jan-06 0:50

Laxman9

30-Jan-06 0:50

that is the trick

if class contains any variable the size of the class is the summation of bytes of member variables

and if no variables then it's size is 1 byte.

and as we know that minimum variable size is 1 byte and those for char variables.

Thanks and Regards
Laxman

FAILURE is the first step towards SUCCESS Cool | :cool:

Re: what is the size of a empty class?

toxcct30-Jan-06 0:44

toxcct

30-Jan-06 0:44

class A {} a;
sizeof(a);

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

Re: what is the size of a empty class?

David Crow30-Jan-06 3:40

David Crow

30-Jan-06 3:40

The size of an empty class is non-zero. Otherwise, two empty classes of the same type would have the same address.

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

2-dimensional arrays

eivanlo29-Jan-06 19:06

eivanlo

29-Jan-06 19:06

I am a newbie in C++ and looking for your help!!

In the below 2-dimensional arrays, what are the index numbers of A, B and C?

_| 0 | 1 |
0| A | B |
1| C | h |

Is (0, 0) the index number of A?
Is (1, 0) the index number of B?
Is (0, 1) the index number of C?

If so, how can I put, let's say, the index number of A(0, 0) into a temporary variable for swapping with the "hole"(1, 1)?

Please advise?

Thanks in advance!!

Re: 2-dimensional arrays

Owner drawn29-Jan-06 19:16

Owner drawn

29-Jan-06 19:16

eivanlo wrote:
Is (0, 0) the index number of A?

No It's (1,1)

eivanlo wrote:
Is (1, 0) the index number of B?

No It's (1,2)

eivanlo wrote:
Is (0, 1) the index number of C?

No it's (2,1)

eivanlo wrote:
If so, how can I put, let's say, the index number of A(0, 0) into a temporary variable for swapping with the "hole"(1, 1)?

int temp = nArray[1][1];//for A
nArray[1][1] = nArray[2][1];//stores the element at (2,1) at (1,1)
nArray[2][1] = temp;//now (2,1) has (1,1)'s value

Jesus Loves Rose | [Rose]

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--Owner Drawn Rose | [Rose]

--Defeat is temporary but surrender is permanent
--Jesus is Lord Rose | [Rose]

Re: 2-dimensional arrays

eivanlo29-Jan-06 19:26

eivanlo

29-Jan-06 19:26

Thanks for your kindly replying!!

But why the index number is (1, 1) for A when the index number in C++ is starts from 0?

Re: 2-dimensional arrays

Owner drawn29-Jan-06 19:28

Owner drawn

29-Jan-06 19:28

Here this will help you...

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclang/html/_pluslang_array.asp[^]

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--Owner Drawn Rose | [Rose]

--Defeat is temporary but surrender is permanent
--Jesus is Lord Rose | [Rose]

Re: 2-dimensional arrays

eivanlo29-Jan-06 19:53

eivanlo

29-Jan-06 19:53

If the arrays is like that,

| A | B |
| C | h |

then, would the index numbers of them be that?

Is (0, 0) the index number of A?
Is (1, 0) the index number of B?
Is (0, 1) the index number of C?

Re: 2-dimensional arrays

Owner drawn29-Jan-06 19:56

Owner drawn

29-Jan-06 19:56

|A (0,0)|B (0,1)|
|C (1,0)|h (1,1)|

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Defeat is temporary but surrender is permanent
--Jesus is Lord Rose | [Rose]

Re: 2-dimensional arrays

eivanlo29-Jan-06 20:02

eivanlo

29-Jan-06 20:02

Thankyou very very much!!

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