Re: Never mind, I found it out - C / C++ / MFC Discussion Boards

Re: Accelerators in a Dialog Application (non-MFC)

georgiek5010-Nov-02 2:40

10-Nov-02 2:40

Have you tried changing your message loop to:

while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(hwnd, hAccel, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

I haven't actually written any apps with a pure dialog but this is what works for the other ones, and if it is a modeless dialog box then the same but you also need:

while (Getmessage...like above
{
if (hDlgModeless == 0 || !IsDialogMessage(hDlgModeless, &msg))
{
if (!Translate...like above
{
}
}
}

This is straight from Petzold's book...page 522. Hope this helps.

DLL problem

Anatari9-Nov-02 18:11

Anatari

9-Nov-02 18:11

I'm a newbie in creating DLL projects and can't seem to solve this problem. I am using a similar technique to Steve Driessen's article[^].

I'm trying to create a DLL that exports a couple of classes that uses some MFC collection objects, but I keep on getting this warning:

<br />
warning C4251: 'CGifParser::m_aData' : class 'CArray<TYPE,ARG_TYPE>' needs to have dll-interface to be used by clients of class 'CGifParser'<br />

(m_aData) is a CArray that is a member of CGifParser, the class I'm trying to export).

The test program works correctly on a debug build, but not on a release build when testing the DLL.

I'm just trying to create a simple library so that I can reuse the code in other projects easier. Visual Studio .Net complicates everything! I first attempted this by trying to create a static library (.lib) but I got all these duplicate declaration errors from the standard C++ libraries. I'm use to simple command line linkers on Unix =).

Thanks.

- Anatari

Re: DLL problem

moliate9-Nov-02 20:46

moliate

9-Nov-02 20:46

This means the base class (CArray) was not declared to be exported. Try adding a line like:

template class __declspec(dllexport) CArray<Arraydata, Arraydata>;

Hope that will fix it..

/moliate

The corners of my eyes catch hasty, bloodless motion -
a mouse?
Well, certainly a peripheral of some kind.

Neil Gaiman - Cold Colours

Weird heap problem in WinXP

Yanuar9-Nov-02 16:29

Yanuar

9-Nov-02 16:29

Hi, I wrote my program using Visual Studio 6 and on Win98.
I used lots of new operator to allocate my object on heap and also to allocate a block of heap and use pointer/array that sorta thing,
everything works just fine and I never had any problem using the new []/delete[] thingy

but when I move my code to WinXP, everything is crash and burn, when I trace and debug it, sometimes my variables/member variables changed its value without any good reason. And sometimes I can't even delete my object

I've allready trace and debug it so that there are no mem. leaks and stuff, but the problem is still the same, and I've read that in WinNT(XP) it uses different dynamic heap managing method.
Is it true ?? so how do you manage your heap in your program in WinXP ??
Is there a safe way (just simple compiler/linker options) to make sure that my heap allocation runs correctly ?? without making any modifications to your code ??

HTML Help(*.chm) Parameters?

Abin9-Nov-02 16:33

Abin

9-Nov-02 16:33

Hi, I made a "chm" file for my application using Microsoft HTML help toolkits , it looked cool and all, the only problem was that I don't know what parameters, if any, can be used to specify(at runtime) which html page(suppose the chm file consists of multiple html pages) I want to display.

For example, my app has some CPropertyPage derived classes, pressing the "Help" button while different property page is active should display different help contents, right?

How can I do so? Thanks.

Never mind, I found it out

Abin9-Nov-02 18:36

Abin

9-Nov-02 18:36

Thanks.

Re: Never mind, I found it out

Dominik Reichl10-Nov-02 4:39

Dominik Reichl

10-Nov-02 4:39

How does it work?

Re: Never mind, I found it out

Abin10-Nov-02 5:33

Abin

10-Nov-02 5:33

// Suppose you have "foo.chm" which consists of
// multiple html pages, and you want to display
// "bar.htm" at this time:
::ShellExecute(NULL, 
              "open", // verb
              "hh.exe", // this file located at Windows directory on every machine which has IE5.0 or higher installed
              "foo.chm::/bar.htm", // yeah this is the trick, you can even do "foo.chm::/bar.htm#blah"
              NULL, // current directory
              SW_SHOW);

Enjoy!

Re: Never mind, I found it out

Dominik Reichl10-Nov-02 9:41

Dominik Reichl

10-Nov-02 9:41

Thank you!!!

Smile | :)

-Dominik

Running a function as the dialog starts

carrie9-Nov-02 9:45

carrie

9-Nov-02 9:45

Hey,

Probably a stupid question but how do I get a function to run after the dialog has loaded?

The situation is I'm writing a mp3->wav converter where a dialog should load up with a progress bar and a couple of static text labels. I just want it to load the dialog then run the Decompress function without any user input at all.

Putting the function call in initInstance just runs it before the dialog has loaded, and putting it in the constructor for the Dialog is causing an error in wincore.cpp.

Any ideas how to fix this silly problem? thanks guys Smile | :)

Re: Running a function as the dialog starts

Stephane Rodriguez.9-Nov-02 9:59

Stephane Rodriguez.

9-Nov-02 9:59

just show the dialog, don't call DoModal.

Back to real work : D-21.

Re: Running a function as the dialog starts

carrie9-Nov-02 11:17

carrie

9-Nov-02 11:17

I'm not too sure what you're meaning I'm afraid. I got it wrong in my first post, I was called the dialogs initDialog() and not the initinstance function.

do you mean changing the int nResponse = dlg.DoModal(); line in the app class? I tried changing that to dlg.ShowWindow(SW_SHOWNORMAL) but its giving errors Frown | :(

Sorry to be a pain in the ass about this and thanks for your help

Re: Running a function as the dialog starts

Stephane Rodriguez.9-Nov-02 11:30

Stephane Rodriguez.

9-Nov-02 11:30

You've got plenty of modeless dialog code snippets on CodeProject to play with.

Back to real work : D-21.

Re: Running a function as the dialog starts

Michael Dunn9-Nov-02 12:03

Michael Dunn

9-Nov-02 12:03

Pick a command ID, such as 100, then at the end of OnInitDialog(), call

PostMessage ( WM_COMMAND, 100 );

Add a handler for that command ID to the dialog, and do the conversion in that handler.

--Mike--
"alyson hannigan is so cute it's crazy" -- Googlism
Just released - 1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click!
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Re: Running a function as the dialog starts

carrie9-Nov-02 12:06

carrie

9-Nov-02 12:06

Fantastic, thanks guys. I think my heads still stuck somewhere painful after my birthday drinks last night Smile | :)

Registry - How to write in HKEY_LOCAL_MACHINE section?

julych9-Nov-02 9:31

julych

9-Nov-02 9:31

Please tell me how or what to change in order to be able to write in HKEY_LOCAL_MACHINE-section of the registry.
Now I'm using the SetRegistryKey(), m_pszRegistryKey and WriteProfileString()
but I can't make them write anywhere else but in HKEY_CURRENT_USER.
Any help will be greatly appreciated!

Re: Registry - How to write in HKEY_LOCAL_MACHINE section?

Stephane Rodriguez.9-Nov-02 10:00

Stephane Rodriguez.

9-Nov-02 10:00

May be a security issue. Check out you are allowed any write access with the regedt32 tool, (security menu).

Back to real work : D-21.

Re: Registry - How to write in HKEY_LOCAL_MACHINE section?

julych9-Nov-02 10:26

julych

9-Nov-02 10:26

I doubt it's a security issue, because it's about writing a key in HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/Run - it's about a key that starts my application when Windows starts. Any suggestions how can I do this in other way?

Re: Registry - How to write in HKEY_LOCAL_MACHINE section?

Michael Dunn9-Nov-02 12:04

Michael Dunn

9-Nov-02 12:04

WriteProfileString() is only used for per-user data such as options for the program. To write to any key in the registry, use the registry APIs or CRegKey in ATL.

--Mike--
"alyson hannigan is so cute it's crazy" -- Googlism
Just released - 1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click!
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Best Encryption algorithm !

Hadi Rezaee9-Nov-02 8:53

Hadi Rezaee

9-Nov-02 8:53

Hello there,

I've some Binary and Text data in some files.
What's the best algorithm to encrypt them ?

Regards,

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Best Encryption algorithm !

Ravi Bhavnani9-Nov-02 8:58

Ravi Bhavnani

9-Nov-02 8:58

Blowfish works for me. There are Dept. of Commerce restrictions that may apply to you if you develop software in the US for export.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Best Encryption algorithm !

ISIS559-Nov-02 9:58

ISIS55

9-Nov-02 9:58

I found these encryption algorithms for both text and binary files, all written in C. Hope it helps:

http://membres.lycos.fr/pc1
(Opens in new window).

Isaac Sasson,
Small time programmer - complainer at large!
Sonork ID 100.13704

Re: Best Encryption algorithm !

Hadi Rezaee9-Nov-02 10:09

Hadi Rezaee

9-Nov-02 10:09

Thanks for reply Wink | ;)

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Best Encryption algorithm !

Scott H. Settlemier11-Nov-02 5:14

Scott H. Settlemier

11-Nov-02 5:14

Best by what measure?
Are you looking for serious security?
(Get the password from outside source,
pass through one-way hash, and use as
the key for a symmetric cipher like
Blowfish?) or...

If the key is a part of your program
(i.e. encoded somewhere reachable),
and you just want a bit of obfuscation,
why not get a little benefit and just
compress the data using some fast alg
like LZSS?

Re: Best Encryption algorithm !

Hadi Rezaee11-Nov-02 7:25

Hadi Rezaee

11-Nov-02 7:25

Cool

Thanks alooot for reply !
Big Grin | :-D

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

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