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Hello,
Jagadeesh VN wrote:
Inside the main(), I created 10000 objects of the structure and assigned it to a pointer variable.
myStruct* obj = new myStruct[10001];<br />
memset( obj,0,sizeof(myStruct) * 10005);
Here you actually create 10.001 structs and initialize 10.005! This is very wrong!
Jagadeesh VN wrote:
for( long l=0;l<100000000;l++)<br />
{<br />
obj++;<br />
l1 += obj->index;
<br />
if( i % 10000 == 0 ){<br />
obj = obj1;<br />
l1 = 0;
}
A couple of questions on this piece of code:
<list> Why the dummy addition (l1 += obj->index;) The compiler won't remove the line, since you use the object further down your code!
Why such a long loop?
Your loop does nothing usefull, why?
To get to an answer, I honestly don't think that the long loop is your problem. I think the problem lies with memset(). Let me explain: your execution time drops liniear with the size of the struct. So the size of the array decreases also liniear. (You halve the size of the stuct, so the size of the array is also halved.) So the amount of memory that memset() has to fill is also halved!
Besides that, your loop executes 100 million times! Don't expect that to finish in a few ms..
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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I am trying to write a function that copies a jpg or a gif to the clipboard, when I pass the path to it.
ie
jpgclip("C:\test.jpg")
Can anybody help me?
Regards
Paul
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Have you looked at SetClipboardData()?
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Yes I have looked at this function, but could use a few pointers on how to use it. I know I can send a bmp to the clipboard with this, but is there anything I need to know when sending jpg or gif?
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See if this search helps.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Hi Everybody
I am doing a project in image processing using MFC.
Could some one tell how to save a bitmap (1 bit,4,8,24 bits respectively).
Thanks in advance.
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No 16 bit ?
If you're using GDI+, read my articles on the subject. Otherwise, I guess either save to bitmap only ( the format is well documented and simple ), or find some other library to use.
Christian Graus - Microsoft MVP - C++
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Hi I am doing a project in image processing using MFC. GetBitmapBits() stores the pixel value in a BYTE array. It works fine with 8 bits bitmap, but when working with 4 bits bitmap, it combines 2 pixel values and stores in the BYTE array.
How to overcome this problem
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Use && and || to combine and mask values, instead of + or =. For example, FF && F0 == F0. If you take an 8 bit number and set it to equal itself && 15, you get only the low four bits, && 240 gives you the high four. In that way, you can set one pixel to zero. Then if you want to set the pixel in the low four bits, you just put oldVal || newval, that copies it in. to copy into the high four, do this: oldval || ( newVal << 4). this shifts the values up four bits first. To just set two pixels do this (pixelLeft << 4) + pixelRight. You can use plus here, because you're replacing both values.
Christian Graus - Microsoft MVP - C++
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Dagnamit. Sorry. 
Christian Graus - Microsoft MVP - C++
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hiho@ll
i try to change the source of a browser helper object, which makes some strange things (like opening google, if i want to open a .js file  )
my question (because i don't really know much about helper objects) how can i debug the object?
it is visible as an Add on in Inernet Explorer
and when i try to debug the bho visual studio .net asks which application holds the debug information
i tried using Internet Explorer, but didn't work
the helper object is a dll
maybe the question should be how to debug a dll?
thx@ll
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Is Release method in _RecordsetPtr must be called in the following code. Only Close is not Enough ?
fun()
{
_RecordsetPtr rs;
//...
//...
rs.Close();
}
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I am building the shell extension for 64 bit windows XP. While compiling the 32 bit shell extension code (working well on windows xp 32 bit) on visual studio.NET 2003 on 64 bit build environment getting the following errors:
myapp.obj : error LNK2001: unresolved external symbol _CLSID_BkgndCtxMenuExt
myapp.obj : error LNK2019: unresolved external symbol _LIBID_DIRBKGNDEXTLib referenced in function _DllMain@12
myapp.obj : error LNK2001: unresolved external symbol _IID_IBkgndCtxMenuExt
anybody please help me on this..
or is there any way to make 32 bit shell extension dll to work on 64 bit windows xp. on windows site its written that 32 shell extension will not work on 64 bit windows..
So what are the interfaces for shell extention in 64 bit windows XP.
thanks
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hi guys! my name's candy..im having a little trouble with a school project of mine..i need to look for a "C programming using pointer" and i dont have any idea what it is..can somebody help me please..id really really really appreciate it if any of you guys can help me..thanks
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Hello,
Using a search engine also does some magic... Anyway, this[^] should help.
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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Check here[^]
<bold>- Nilesh
<italics>"Reading made Don Quixote a gentleman. Believing what he read made him mad" -George Bernard Shaw
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Is your name really Candy, or did you just think that was a name that would get guys to help ? :P
Seriously, the web is full of help, there is at least one article on this site, and your textbooks should be loaded with info also. However, by all means if you read your textbook and you're stuck on *specific* things, feel free to ask, whatever your name is....
Christian Graus - Microsoft MVP - C++
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Christian Graus wrote:
Is your name really Candy, or did you just think that was a name that would get guys to help ?
And no, I didn't answer because the name was Candy... 
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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yes my name is really Candy  thanks for the help..i really appreciated it
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thank you so much guys! i really appreciated all the help!! by the way..no i did not use the name Candy so that i could get guys to help me because my name is really Candy..tnx!
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How to remove close button from window?I just want maximize and minimize buttons on window.if it is not possible to remove close button can i make it disable?
I have tried it using WS_MAXIMIZEBOX and WS_MINIMIZEBOX .But it is not working.
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Hello,
I don't think that there is an easy way to remove the close button, since it's part of the system menu. You can use GetSystemMenu() to disable it..
You can also remove the entire title bar.
But please tell me why you want to remove the close button? Users will be really annoyed by this!
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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Try this: GetSystemMenu(FALSE)->EnableMenuItem(SC_CLOSE, FALSE);
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Hi,
I've written a windows service to parse files.It uses the FileSystemWatcher class in C# to sniff a folder for particular type of files. But when the files were being processed, i repeatedly get the error "The process cannot access the file "AAA" because it is being used by another process". To overcome this problem, i added the following. lines of code
<br />
<br />
public bool ParseEnvFile(string strFilePath)<br />
{<br />
try<br />
{<br />
using(FileStream fs = new FileStream(strFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))<br />
{<br />
fs.Close();<br />
m_nReadAttempts = 0;<br />
}<br />
}<br />
catch(IOException ex)<br />
{<br />
if(m_nReadAttempts < 3)<br />
{<br />
Thread.Sleep(2000);<br />
m_nReadAttempts++;<br />
return ParseEnvFile(strFilePath);<br />
}<br />
else<br />
{<br />
throw ex;<br />
}<br />
}<br />
.....<br />
}<br />
But even this did not solve the problem. The exception still kept coming, though less frequently.
So I was forced to add a Timer event(runs every 5 mins) that would pick up all the files that were left over because of the exception.
Now, my problem is this:
When a file gets created in the folder, sometimes both the OnFileCreated event and the timer event try to access the file at the same time. Within my
service, I'm required to open the file in write mode and update some contents. I find that at times the file that gets created ends up as a 0KB file (Note: when it initially got created the file had some content in it)!!!!
Any ideas on why this happens?
Thanks for any help in resolving this problem.
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