C / C++ / MFC

Help:How to change the images in the CTreeCtrl dynamicly?

23-Apr-06 13:50

Looks like it's becase your including both "winsock2.h" and "winsock2.h". It looks you're meant to pick one or the other - I'd choose "winsock2.h".

Steve

bruspark22-Apr-06 22:47

bruspark

22-Apr-06 22:47

I use the class CTreeCtrl Created a Tree Control.
With the member function SetImageList() I can set images to the tree contrl.
Now,I want to change the image in a paticular TREEITEM,and there is no such function.
How can do that?

Thanks

Bruspark

Re: Help:How to change the images in the CTreeCtrl dynamicly?

includeh1023-Apr-06 2:53

includeh10

23-Apr-06 2:53

u didn't see SetItemImage() or it didn't work?

A special image tool for C++ programmers, don't miss it!
The world unique Software Label Maker is here for you and me ...
A nice hyper tool for optimizing your MS html-help contents.

Property Sheet and Property Pages

Imtiaz Murtaza22-Apr-06 22:06

Imtiaz Murtaza

22-Apr-06 22:06

Friends,
I've a property sheet with two property pages. What i want is that, whenever the user tries to swich to the second page, the data in the controls of current page should be validated and if the data is wrong, user should remain in the current page and not switch to the other page. How can i do so ?

Imtiaz

Re: Property Sheet and Property Pages

Michael Dunn22-Apr-06 22:58

Michael Dunn

22-Apr-06 22:58

Handle PSN_KILLACTIVE and do your validation there. The handler can return true to prevent the change.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

removing a substring from a std::string

rahultaing22-Apr-06 19:57

rahultaing

22-Apr-06 19:57

can anyone tell me how do I remove a substring from a string, like i have "abc.xml" and i want to remove ".xml" from it and in turn just get abc. How do i do it?

Re: removing a substring from a std::string

Stephen Hewitt22-Apr-06 20:27

substring in a std::string

22-Apr-06 20:27

Type something like this. Again I haven't tested this.
---------------------------------------
string::size_type LastDotPos = YourString.find_last_of('.');
if ( LastDotPos != -1 )
{
string BeforeDot = YourString.substr(0, LastDotPos);
}

Steve

rahultaing22-Apr-06 19:21

rahultaing

22-Apr-06 19:21

can anyone tell me how to check whether a particular substring is present in a given string or not? I have a string containing file name and I have to check whether the file is an xml file or not. So I have to look for ".xml" substring in that given string. How do we do that?

Re: substring in a std::string

Stephen Hewitt22-Apr-06 19:45

22-Apr-06 19:45

Try something like this. NOTE: I haven't tested this so your mileage may vary:
----------------
string::size_type LastDotPos = YourString.find_last_of('.');
if ( LastDotPos != -1 )
{
string Extension = YourString.substr(LastDotPos);
transform(Extension.begin(), Extension.end(), Extension.begin(), ::tolower);
if ( Extension == ".xml" )
{
// Ends in ".xml".
}
}

Steve

Wait for Thread

RedDragon2k22-Apr-06 16:35

RedDragon2k

22-Apr-06 16:35

Hello,

I currently working on a program. Suprise, suprise. And this program has to wait for a client to connect and then do something with the client. I put the wait for client, etc. stuff into a thread so that my interface is still useable, but since it's a thread my main program continues running. How can I prevent this ? So the Interface of my Main Program should keep useable but it should not continue work till a client connected.
Any Ideas or Suggestions ?

With best regards,
Benedikt

Stephen Hewitt22-Apr-06 17:36

22-Apr-06 17:36

RedDragon2k wrote:
my main program continues running

Wasn't that the whole idea of making another thread? I assume you mean you don't want the user to be able to use the UI? If this is the case just disable the main window or bring up a modal "please wait" dialog that is dismissed when the worker thread is done by sending a WM_CLOSE message to it.

Steve

RedDragon2k23-Apr-06 16:11

RedDragon2k

23-Apr-06 16:11

Hello,

nice ideas. But I think they won't work, because the my app does are done silent. All in all just want the UI to be drawn correctly. And the possibility to stop the work (so interaction).

Hope this helps,
Benedikt

Nick_Kisialiou22-Apr-06 21:59

Nick_Kisialiou

22-Apr-06 21:59

Can you use ::WaitForSingleObjectEx(...) function?

Stephen Hewitt22-Apr-06 22:21

22-Apr-06 22:21

If he uses this API the UI will not redraw properly while the worker is running.

Steve

Forwarding Functions between DLL's

John R. Shaw22-Apr-06 22:24

John R. Shaw

22-Apr-06 22:24

That is easy just do not return from the thread util a client has reacted. No wait a client may never react and then you end up with an infinite loop.

There are multiple ways to provide a solution to this problem, the simpilest is to disable all commands that require the client to communicate with you. That is anything that is not be dependent on an outside source, like close application. The main thread should never be disabled, because you always need the option of shuting down the program.

INTP
“Testing can show the presence of errors, but not their absence.”
Edsger Dijkstra

Bram van Kampen22-Apr-06 14:37

22-Apr-06 14:37

I have an API with code distributed over several DLL's. I now want to create a single DLL with functions which will be forwarded to the several existing DLL's. Very much on the same line as the Windows Kernel.DLL is implemented. Do I have to write code to generate such thing, or, are there settings in the VCPP IDE to achieve this the Microsoft way.

I am thinking of something like:

_MyFunction=Existing.Dll:?MyFunction@YKKKK@Z

LateNightsInNewry

cmk22-Apr-06 14:57

cmk

22-Apr-06 14:57

You've kinda answered your own question:

"I now want to create a single DLL"
"Do I have to write code to generate such thing"

You have to write the dll.
However, it sounds like you could write a tool to generate the code from a config file with the mappings the way you want (_MyFunction=Existing.Dll:?MyFunction@YKKKK@Z).

...cmk

Save the whales - collect the whole set

Bram van Kampen22-Apr-06 15:08

22-Apr-06 15:08

cmk wrote:
You've kinda answered your own question:

No, I've Not, you don't understand the question!

The Windows KERNAL.DLL is implemented by sending a Call to each function on to another DLL within the appropriate operating system. Kernal.DLL actually does not contain any excecutable code. There is also no secret about the Binary part of Forwarding. Microsoft has implemented this mechanism for donkies years, it ensures that a 32 bit PE Binary runs equally on systems from Win95 thru Win 2000.

The question is: Is there an existing tool to Achieve this:-

i.e.:

- Do I Achieve this through some obscure settings in the Projects\Settings Dialog? (Use a Microsoft Tool)

- Do I achieve this through some obscure .DEF File Syntax (Use a Less Known Microsoft Tool)

- Is the Only way to achieve this by writing Code which during Run time generates a Binary of a DLL to achieve the result (Develop my Own Tool)

I Will develop my Own Tool if required, but, before embarking, would like to know if there is any need to do so.

LateNightsInNewry

-- modified at 21:11 Saturday 22nd April, 2006

cmk22-Apr-06 17:16

cmk

22-Apr-06 17:16

LateNightsInNewry wrote:
No, I've Not, you don't understand the question!

Calm down, actually i do understand the question.

You mention that you found somewhere else that you can use a def file and use _MyFun=NTDLL.?Another@YKKKk@Z syntax.

I am well aware of how to use a def file, however, redirection to another module is not documented in MSDN:
http://msdn2.microsoft.com/en-us/library/hyx1zcd3(VS.80).aspx[^]

As far as i was concerned you could only use the "=" syntax to rename an export within the given module.

I'll be interested to see if <export name="">=<module>?<function|data> syntax works (actually i think i'll try whipping up a small test now).

You use "NTDLL." as the module name - can you specify the extension e.g. "MYMOD.DLL" or "MYMOD.EXE" (for cases where both a dll and exe may exist with the same name) ?

[EDIT]
Actually a quick search found (and others):
http://www.osix.net/modules/article/index.php?id=728[^]

I had assumed you would have to do something like:
http://www.woodmann.com/fravia/fragas1.htm[^]
[/EDIT]

...cmk

Save the whales - collect the whole set

-- modified at 23:27 Saturday 22nd April, 2006

Bram van Kampen23-Apr-06 15:11

23-Apr-06 15:11

The problem is that it is not documented as such. I got the answer from:
http://msdn.microsoft.com/msdnmag/issues/0203/loader/default.aspx

Look at the attached project files.

tried it, and it works! Just be sure to get the Name Decorations right.

LateNightsInNewry

Bram van Kampen22-Apr-06 16:34