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some can be determined, like
WM_PAINT vs WM_CREATE
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followait wrote: some can be determined
By the compiler?
I don't know of any MFC/Windows-specific optimizations in the VC++ compiler.
The source code for the BEGIN_MESSAGE_MAP macro will tell you if
it's optimal to move frequent messages to the top.
FWIW, I've always done that, but I've never bothered to check if it helps.
For all I know, it's the reverse  Please let me know what you find!
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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Do you have any metrics to claim that the MESSAGE_MAP is not optimal ?
anyway, if that's your only performance concern in your application, you can just stop there and go have a beer.
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Why not put WM_PAINT before WM_CREATE?
Maybe the perform here can be ignored.
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If the MESSAGE MAP really IS a map, then the order of items is not likely to make a difference at all...
Peace!
-=- James Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles
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James R. Twine wrote: If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
That's a fantabulous quote.
Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP
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Do you experience any problem with your application ? Is it so painfully slow that you need to look at each msec that you can gain ?
Otherwise, I'll cite a famous quote from Donald Knuth:
Early optimization is the root of all evil.
With which, on this specific case, I absolutely agree. You'll probably end up doing things much worse (making the code more difficult to maintain, full of bugs, ...) just to gain something totally neglectable.
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Cedric Moonen wrote: each msec
That ought to be some fraction of nano sec, I guess. 
Cedric Moonen wrote: With which, on this specific case, I absolutely agree. You'll probably end up doing things much worse (making the code more difficult to maintain, full of bugs, ...) just to gain something totally neglectable.
Well put.
Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP
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followait wrote: Will the compiler optimize the MESSAGE MAP of each class?
The answer is NO.
The arrangement of lines of code in your MFC MESSAGE_MAP has no effect on the compilers output.
Best Wishes,
-David Delaune
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I am working on a project and i want to determine the size(memory) of the flash on which i am supposed to restore . is there anyway by which i can determine it
prashant jain malviya national institute of technology
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just hack into the file 
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Hello Friends,
I am creating a toolbar in which we are using an activeX control for search engine.When focus is on activex control Rich edit box and press alt key than alt key toggle to file menu but at the same time richeditbox hides.
Thanks in advance.
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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I am currently generating a BMP file by capturing screenshot of the current active window. Any ideas how to convert it to JPG format in order to make its size small. We are Ok with some loss occuring in image quality after the conversion.
Thanks
Cagespear
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You may use GDI+ Image class to save it as JPEG file [^].
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.
[my articles]
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#include <atlimage.h>
...
CImage CapturedBitmap;
CapturedBitmap.Create(width, height, 24);
HDC BitmapDC = CapturedBitmap.GetDC();
...blt the window/screen pixels to BitmapDC ...
CapturedBitmap.ReleaseDC();
CapturedBitmap.Save(_T("c:\\myjpeg.jpg"), ImageFormatJPEG);
Mark Salsbery
Microsoft MVP - Visual C++
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This looks really neat Mark! Thanks a ton for the reply!
Cheers!
Cagespear
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If you handle of it you can use of
CImage m_Image;
m_Image.Attach(hbitmap);
m_Image.Save("c:\\1.jpg");
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Hi friends ....
i have one doubt with check the mobile..suppose i can check the one mobile or phone's RSSI (Received Signal Strength Indication).Where i can get that it
Mobile Switching Center(MSC) or Signal towers or something else ....
plz tell me ur suggestion also!!!
Thanks n Advance.
raju.k
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Oh yes, it's very interesting.
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.
[my articles]
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CPallini wrote: Oh yes, it's very interesting.
Regards,
Vijay.
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Regards,
Vijay.
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I'm sure I'm going to regret answering you, but you might get help from the Mobile forum, rather than here.
I would imagine there is an API in Windows Mobile to get that information - but it could be quite hard. After all, which signal strength? GPRS, CDMA, GSM, GPS, Wifi, Bluetooth? And that's just the ones I can think of.
Iain.
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Hi all,
i am working on password encryption in my VC++ application.When i try to create a key container, the function CryptAcquireContext() fails with NTE_BAD_KEYSET( 0x80090016L ). and the subsequent call fails with NTE_EXISTS( 0x8009000FL ),(i could not reproduce it consistently). Is this occurs because of the key container access rights.? i could not figure out which are all the users are not accessable to a particular container..!(i m using default key container as i kept second parameter of the CryptAcquireContext() to NULL). i understand that this access rights may related to the user who creates the container, then too i m in confusion coz i could not reproduce the problem if i experiment this as explined in msdn. i think my understanding about the access on key container is not exact. can some one help me out regarding this issue..!! here the code snippet where i got the error messages.
if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, 0))
{
if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
{
return FALSE;
}
}
Thanks in Advance
kathir
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Try using a named container. I was facing a similar issue as yours and this did fix my issue.
if (!CryptAcquireContext(&hProv, "Container", MS_DEF_PROV, PROV_RSA_FULL, 0))
{
if (!CryptAcquireContext(&hProv, "Container", MS_DEF_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
{
return FALSE;
}
}
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yes cagespear, its working with a unique container name..!! but i want to use default container...! any guess about why its not working with NULL value..?i jus want to know the reason why its not working..?
regards
kathir
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