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Hi,
A simple MessageBox("Some errors") like this one works well.
But when i use the MessageBox(NULL, str, szMsg, MB_OK), there
is complier error. Where is my mistake?
Thanks in advance!
chen
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Your mistake is you're not providing the right argumtns. Check the docs for CWnd::MessageBox.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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I guess that the first arg cannot be NULL.
This will work:
MessageBox(strErrorText,strErrorTitle,MB_ICONSTOP|MB_OK);
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
 Bluute tette!
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No, the compiler error is due to the four parameters
used in MessageBox. It seems that i must include some
hearder files or Lib?
chen
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Maybe "afxwin.h".
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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If you are calling the message box from inside a CWnd dervied class then you don't need the NULL. It uses the current CWnd object for the parent window.
However you can use the same call by using ::MessageBox(NULL, str, szMsg, MB_OK) which calls the default API version.
Michael 
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Hi,
is there an easy solution to add music playback to a demo? I think about playing an OGG (or MP3). It would be great if I can name a file and say start, stop or control volume.... DLL or source code.
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For playing MP3 check this:
http://www.codeproject.com/audio/mp3player.asp
Mazy
"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica
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thx, will have a look on both
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hey guys/gals ,
Actually i am animating the window .when thw window is shown there is some text displayed in it which is not underlined and when the mouse (leave) moves the window i want the text to be underlined.
Actually i am getting the mouse leave event but dont understand why the text is not able to remove the underline part. If any body possibly can help me .
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How are you handling the painting. Does the paint function get called in the mouse leave event?
Posting the portion of the code that is giving you problems would be a great help.
Michael
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What is the delete-function for memory allocated by GlobalAllocPtr?
tnx.
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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Could it be GlobalFreePtr? I don't find any docs about these macros on the msdn (tell something new  ).
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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GlobalFreePtr
Note that if you use Win32 there is really no need to use this. The Win32 memory archetecture does not keep a separate global heap. LocalAlloc and GlobalAlloc are the same, and both malloc and new eventually calls a similar function called HeapAlloc.
/moliate
Two o'clock and walking through familiar London - Or what was familiar London before the cursor deleted certain certainties -
I watch a suit and tie man giving suck to the Psion Organizer lodged in his breast pocket
its serial interface like a cool mouth hunting his chest for sustenance, familiar feeling, and I'm watching my breath steam in the air.
Neil Gaiman - Cold Colours
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But is it harmless if you do use it?
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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Yes, but it is only included for Win16 compability. It is a macro for allocating memory and locking the handle, which is not nessicary in Win32. Unlike Win16 memory allocation methods, Win32 methods have very few efficiency differences.
MSDN says that if you decide to use GlobalAllocPtr, GlobalFreePtr should be used to release the memory. This is probably just for backward compability, but better safe than sorry...
Cheers
/moliate
Two o'clock and walking through familiar London - Or what was familiar London before the cursor deleted certain certainties -
I watch a suit and tie man giving suck to the Psion Organizer lodged in his breast pocket
its serial interface like a cool mouth hunting his chest for sustenance, familiar feeling, and I'm watching my breath steam in the air.
Neil Gaiman - Cold Colours
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It's really strange when your application works perfect under debug version, and later when you switch to Release it crashes. Here is how it happens.
1) I use CreateProcess to start a program and wait untill it ends.
CreateProcess of course crashes under Win2k/XP.
2) Then I switch to ShellExecute. Same thing happens.
3) I don't want to use WinExec!
So what's the difference between WinExec/ShellExecute/CreateProcess, and if you can provide some working code with theese functions
Regards,
Deian
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It is not surprising at all.
In dubug mode when you are using arrays or strings the compiler can reserve up to 16 bytes more that are actually needed. If you then write past the end of the memory and are still within that 'safe' area you will not have a problem. In release mode however even writing one byte past the end can cause a crash.
I would also take a careful look for memory and resource leaks some of which only cause an oject dump in debug mode but crash in release mode.
Happy programming!!
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Check out this article
It will not tell you what is going on withe CreateProcess and ShellExecute but it will give you an idea about the differences between Release mode and Debug mode
Best regards,
Alexandru Savescu
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Hi Deian,
Take a look at Surviving the Release Version.
Good luck!
- Jason
(SonorkID 100.611)
"I just recieved an email from myself but I didn't send it ?"
- Colin Davies, Sonork conference
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Thanks a lot guys, I really appreciate it
Greetings,
Deian
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Hi everyone!
I have to add an en-/decryption-algorithm into an (already existing) image processing application which uses the CImgEdit control by Kodak for displaying TIFF images. In order to implement the algorithm on the images I need direct access to the image data.
It would be easy to en-/decrypt the whole TIFF file. But due to reasons beyond my influence ONLY the image itself should be en-/decrypted, so that an encrypted TIFF file can be opened with any TIFF viewer but pixel-waste is all that is displayed... 
Another point is, that I'm not allowed to write the decrypted image data onto disc but have to do any decryptions in memory solely.
Many thanx to anyone who can help me with this problem.
Best regards,
Andreas
P. S. I'm new at CodeProject and very hopeful someone will provide me the help I need
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Hello guys, I'm experiencing a strange behaviour in one of my programs. I use mutex to prevent two copies of my program running at the same time. Under win 9x/Me works fine, but under Win2k and XP don't. Any ideas why? Any advice, code sample or link appreciated
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Actually there should be no reason why it should not work.
You could post the code snippet, that would be more helpful
to see your problem
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