C / C++ / MFC Discussion Boards

georgiek5010-Nov-02 4:38

10-Nov-02 4:38

Has anyone gotten the last paramter to LoadImage LR_TRANSPARENT to work? I myself have not...(image loads but with the white background that clashes with the window). Can anyone help me on this?

Re: Loading Bitmaps transparent

Dimitri Rochette10-Nov-02 5:03

Dimitri Rochette

10-Nov-02 5:03

if your talking about LR_LOADTRANSPARENT here is perhaps the answer.
First of all LR_LOADTRANSPARENT does not load transparent image. it replace the first color by COLOR_WINDOW. COLOR_WINDOW is the backgroud color of edit,combobox... by defaut it's white. To change this color by another, you need to replace this color in your window theme.
The second problem is that LR_LOADTRANSPARENT works only with 8bpp images.

The easyest way to use real transparent images is to use CommonControls ImageList.
If you only want to replace one backgroud color by another CommonControls CreateMappedBitmap is perhaps a best solution.

Dimitri Rochette

file related application

includeh1010-Nov-02 4:16

includeh10

10-Nov-02 4:16

i explain:
click a .cpp file, if VC was installed, then VC pops up and displays the .cpp. if borland was installed ...

so, .cpp file is related VC or Borland.

if i develop a nodepad, how do i make .cpp etc related to my application? i guess it is something in register but ...?

thx

includeh10

Re: file related application

User 665810-Nov-02 4:37

User 6658

10-Nov-02 4:37

Dunno if it is the correct key, but you might try HKEY_CLASSES_ROOT\cppfile\shell\&Open with MSDev

modified 12-Sep-18 21:01pm.

Re: file related application

includeh1010-Nov-02 4:51

includeh10

10-Nov-02 4:51

thx, that is right i think.
i.e. in .java i found "JCreator.java", but why jcreate.java, not jcreate.exe?

there should be more. i.e. i click my.txt (if it is related to MyApp.exe), how system passes the file name "my.txt" to MyApp.exe, from command line?

includeh10

Re: file related application

Scott H. Settlemier11-Nov-02 5:07

Scott H. Settlemier

11-Nov-02 5:07

First you'll need to come up with a "document name".
Something like MyFunkyAppDocType or whatever. Then
create a key under HKEY_CLASSES_ROOT by that name.
Under that key create keys Shell\open\command.
Set the default value to the command line to open
the document type. e.g. "C:\Program Files\MyFunkyApp %1"
Next, under HKEY_CLASSES_ROOT you'll see all the extensions
with associations. Just place the extension you want
associated there as a new key, and set the default value
to your document name.
But don't step on other associations without ok from the user.
i.e. check that your document name is unique. check that
the association is free or the user is willing to allow you
to overwrite it.

how can i add system icon

xipeng10-Nov-02 2:37

xipeng

10-Nov-02 2:37

there is not WS_SYSMENU in my dialog,and the dialog app have no system icon and system menu.
how can i set the system icon or system menu?
and SetIcon() can not work.
please help me.

Re: how can i add system icon

georgiek5010-Nov-02 2:43

georgiek50

10-Nov-02 2:43

If you made this dialog in the resource editor then you have a choice of system menu which you can add.

Re: how can i add system icon

xipeng10-Nov-02 3:03

xipeng

10-Nov-02 3:03

thanks.
i have found it

Where can I get network programming sample codes?

George210-Nov-02 1:17

George2

10-Nov-02 1:17

Hi, everyone!

I have read some books about VC network programming, but in
them there are only basic samples (just to show the usage of API).

I want to know where can I get some sample codes of some more practical
samples? I want to learn socket programming.

Where can I get the codes and related explanations?

Cheers,
George

Re: Where can I get network programming sample codes?

georgiek5010-Nov-02 4:40

georgiek50

10-Nov-02 4:40

Try this link...there are many sample winsock apps out there, I was searching for them a few weeks ago and found hundreds of them...here is a good starting point though: http://tangentsoft.net/wskfaq/ Go to Yahoo and search winsock you will see what I am talking about.

Re: Where can I get network programming sample codes?

George210-Nov-02 19:35

George2

10-Nov-02 19:35

Thanks, georgiek50 pal!

It is a very nice site!

Cheers,
George

Re: Where can I get network programming sample codes?

valikac10-Nov-02 5:32

valikac

10-Nov-02 5:32

What Windows network programming books did you read? I recommend Network Programming for Microsoft Windows, Second Edition by Anthony Jones and Jim Ohmund.

CodeProject has a network programming section with very good examples.

http://www.codeproject.com/internet/

Kuphryn

Re: Where can I get network programming sample codes?

George210-Nov-02 19:37

George2

10-Nov-02 19:37

Thanks, Kuphryn pal!

Your recommendation is very nice!

Cheers,
George

debug exit codes

Steve L.9-Nov-02 23:23

Steve L.

9-Nov-02 23:23

When I debug my program, it says something like thread so-and-so has exited with code ######. There aren't any memory leaks but I don't know what the exit code means. Is there a list somewhere of what the codes are or does it really not tell you anything?

There's always one more bug.

Accelerators in a Dialog Application (non-MFC)

cleathley9-Nov-02 21:24

cleathley

9-Nov-02 21:24

Hi
Is there anyway to get accelerators working on a pure dialog application..

I've seen some notes about hooking into the message process but no examples of it..

I'm not using MFC.

Cheers

Chris

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

georgiek5010-Nov-02 2:40

georgiek50

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

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