Making an Edit multiline? - C / C++ / MFC Discussion Boards

Re: Accessing a web Service from VC++ application

Member 5343578-Jul-04 3:13

8-Jul-04 3:13

The code for GetWeather is as follows:
public void GetWeather(string stationcode)
{
Weather weather = new Weather();
GetWeather getweather = new GetWeather();
weather = getweather.GetWeatherObject(stationcode);
}

Yes it does require a BSTR as the parameter & it does not return any value, basically all the function does is update a database with the latest weather.
It seems to be failing in the atlSoap.h file in the SendRequest function when it tries to navigate to the url, it fails in sending the message to the server os the wuestion is WHY?

Re: Accessing a web Service from VC++ application

Antti Keskinen8-Jul-04 9:48

Antti Keskinen

8-Jul-04 9:48

Could you please post a link to the actual web service, or is it for private use only ?

It is nearly impossible to say anything about the actual problem before debugging it personally. It looks like that the problem in the actual service, that it is unable to handle the request. But why, then again, impossible to say. Perhaps the implementation of the web service isn't programmed properly to support VC++ callers. The 'string' variable looks like .Net Framework variable, and as such, it is not directly compatible with the BSTR variables of VC++ COM architecture.

Unfortunately, I cannot help you further until I can give a few shots at using the web service myself.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Any suggestions on a parser?

prcarp7-Jul-04 3:16

prcarp

7-Jul-04 3:16

I am looking for a script parser written in C/C++ (that will compile under VC6 at least) that meets these requirements:

1) Simple VB-like instruction set (FOR/NEXT loops, IF/THEN/ELSE blocks, DO/WHILE loops, basic variable assignments and expression parsing). The lines of the source file are supplied from a text file (no editor front-end required).
2) Supports integer, floating, and string type variables.
3) Will compile into byte-code for faster, repeated runs.
4) The parser and byte-code interpretter are in C/C++ (MFC okay) and are open-source and/or GPL'd. No special binaries or libraries needed.
5) Nice-to-have-but-not-required: function support, GOSUB/GOTO, advanced math functions (sine/cosine), custom functions (PRINT)

I looked at MyBasic on this site as a basis but don't think I can use it because it lacks requirement #3. I also followed some of the links on the MyBasic message boards but couldn't find anything that would help. This script parser/interpretter is going to be a small part of a larger project and I was hoping not to re-invent this wheel. I am looking for something that is lean, easy to drop-in (or port), and quick enough to be used in a real-time application (as in a quick interpretter).

Any of you gurus have any suggestions? Or pointers where I can look?

Thanks in advance,
Paul

Re: Any suggestions on a parser?

siggapet7-Jul-04 3:26

siggapet

7-Jul-04 3:26

Take a look at GoldParser, its not written in C/C++ but you should be able to use it from VC6.

Re: Any suggestions on a parser?

palbano7-Jul-04 4:00

palbano

7-Jul-04 4:00

I didn't check it against your requirements. I figure you could do that. Smile | :)

http://www.compuphase.com/small.htm[^]

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Re: Any suggestions on a parser?

Andrew Walker7-Jul-04 14:21

Andrew Walker

7-Jul-04 14:21

Your list is terrific, but in most situations scripting languages don't cover 3) as well as you might like. The most common approach is to code as much as you can in the scripting language, and only then if profiling shows that performance is insufficient, add a hook to optimised code written in C/C++ or dare I even say it, FORTRAN if required. Both Python and Lua meet all these requirements and both can be compiled to byte code.

You're also missing a few things fromt he list.
6) It needs to be easy to use (client usability)
7) It needs to be easy to integrate (programming perspective)
8) It needs to be easy to extend

The easiest way to achieve 6) is to use a language which most people already know or can learn very quickly. Custom languages or very small parsers / languages might have some quirks that take a while to work out

7) and 8) go hand-in-hand, and I would recommend picking a language on how easy it is to use, integrate and extend from the programmers perspective as well as the clients. Writing and maintaining language bindings is not the type of code that you'll want to write every day.

There are two major classes of bindings to languages at the moment - as a precompilation step (SWIG) or as part of the compilation (boost::python and luabind). My personal preference if for the later, because it guarantees that your bindings are always upto date.

http://www.lua.org/[^]
http://luabind.sourceforge.net/[^]

http://www.python.org/[^]
http://www.boost.org/libs/python/doc/index.html[^]

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

Re: Any suggestions on a parser?

prcarp25-Jul-04 20:39

prcarp

25-Jul-04 20:39

Great suggestions! I looked into LUA and I think it will do all that I want - and more. It looks pretty well written and organized and it is always a bonus when I can learn from others.

Making an Edit multiline?

steven117-Jul-04 1:56

steven11

7-Jul-04 1:56

Hi,
sounds easy, but it's very complicated...
I want to have a custom drawn TreeView with multiline items. The drawing of the tree works perfect but when the EditBox to edit the items text (TVN_BEGINLABELEDIT you know) is created it is - of course - singlelined.
Now I wanted to make it multiline and therefore I tried to use ModifyStyle but it didn't succeed.
The next approach was to create a CBT-Hook to hook the creation of the Edit and "smuggle" the ES_MULTILINE-Style into the windowstyle but strangely this also didn't succeed. Do you have any suggestions? the CBT-Hook is definitely called (I verified this with TRACE and Spy++).

Here's the HookProc-Code (hTree is the HWND of the tree):

LRESULT CALLBACK HookCreateWindow (int nCode, WPARAM wParam, LPARAM lParam)
{
if (nCode == HCBT_CREATEWND) {
CBT_CREATEWND* pCWnd = (CBT_CREATEWND*) lParam;
if (pCWnd->lpcs->hwndParent == hTree) {
pCWnd->lpcs->style |= ES_MULTILINE;
TRACE("\nEdit_created. HWND: 0x%x", (HWND) wParam);
}
}
return CallNextHookEx(g_hHook, nCode, wParam, lParam);
}

Thanks for your answers!

Re: Making an Edit multiline?

siggapet7-Jul-04 3:49

siggapet

7-Jul-04 3:49

How are you planning on ending that editbox? Those labeledits are either aborted with esc or accepted by pressing enter. A multiline labeledit would instead create an extra line when the user hits enter. I suspect this is the reason the control is refusing to become multiline. A solution would be to overload the F2-key and pop up your own dialog with a multiline edit box, a OK button and a Cancel button.

Re: Making an Edit multiline?

steven117-Jul-04 6:06

steven11

7-Jul-04 6:06

You can end it with clicking outside the edit on a treeview-item (done by the treeview-control). it's a normal editbox and therefore i should be able to change the style BEFORE it receives the first message (WM_CREATE). and i don't want your solution with the dialog, i don't think that's nice :/

Difference between thread and fiber on windows

haritadala7-Jul-04 1:46

haritadala

7-Jul-04 1:46

Hello all

Can any one please explain me the difference between thread and a fiber? In what circumstances we should go for a fiber? Please give me some sample code or point to URL where I can get the same.

Thanks for your help.
Hari.

Re: Difference between thread and fiber on windows

David Crow7-Jul-04 2:35

David Crow

7-Jul-04 2:35

From MSDN:

A fiber is a unit of execution that must be manually scheduled by the application. Fibers run in the context of the threads that schedule them. Each thread can schedule multiple fibers. In general, fibers do not provide advantages over a well-designed multithreaded application. Fibers are not preemptively scheduled.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

How to Detect Invalid Filenames

Steve Thresher7-Jul-04 1:37

Steve Thresher

7-Jul-04 1:37

Is there an API available to check if a filename is valid. At the moment the only information I can find is in the help for CreateFile() where it gives a list of invalid characters and filenames such as ./?\* or com1,con,lpt.

Systems AXIS Ltd - Software for Business ...

Re: How to Detect Invalid Filenames

V.7-Jul-04 1:44

7-Jul-04 1:44

try/catch opening the file with specified filename?

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: How to Detect Invalid Filenames

PengFeidu7-Jul-04 2:17

PengFeidu

7-Jul-04 2:17

Hello!
if you only check the string of the filename,you can check if the string have the list of "./?;'".

if you check whether the file is existent, you can use code as follow in VC6.0 :

BOOL CheckIfFileExists (LPCTSTR szFileName)
{
ASSERT( szFileName != NULL );

if( _tcslen(szFileName) == 0 ) return FALSE;

DWORD dwAttr = GetFileAttributes(szFileName);
if( dwAttr == 0xFFFFFFFF ) return FALSE;
return (dwAttr & FILE_ATTRIBUTE_DIRECTORY) == 0;
}

dupengfei

i Have two Question Pls Some one reply

ThatsAlok6-Jul-04 23:55

ThatsAlok

6-Jul-04 23:55

Question #1 : pls some give me some good pointer to smart card api's. i need them urgently or some sample project using Smart Card apis

Question #2: i am unable to use or rather say understand RegisterWindowMessage() api's.Any body pls gice me some pointer towrad it also.

thanks a lot in advance

I Think It will Work
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: i Have two Question Pls Some one reply

Abhi Lahare7-Jul-04 0:34

Abhi Lahare

7-Jul-04 0:34

Alok the programmer wrote:
Question #2: i am unable to use or rather say understand RegisterWindowMessage() api's.Any body pls gice me some pointer towrad it also.

Here is some explaination from one of expert:

The RegisterWindowMessage function defines a new window message
that is guaranteed to be unique throughout the system.

So with that in minde this is one example of how to use this
special message.

If I have this code in one of my applications:

<br />
LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)<br />
{<br />
  LRESULT Result;<br />
<br />
  static UINT my_message = RegisterWindowMessage("my_message");<br />
<br />
  if (msg == my_message)<br />
  {<br />
    MessageBox(hwnd, "Someone sent me my_message", "Message", MB_OK);<br />
    return 0;<br />
  }<br />
<br />
  ....<br />
<br />
  return Result;<br />
}<br />

I could talk to that application from my second application
using the following code:

// Use FindWindow, EnumWindows and EnumChildWindows to get
// the hwnd of the other application
hwnd = getting_other_hwnd_left_as_excersise_function();

UINT my_message = RegisterWindowMessage("my_message");

//-- post the hwnd the special message
::PostMessage(hwnd, my_message, 0, 0);

You could also do this:

//-- broad cast a special message
::PostMessage(HWND_BROADCAST, my_message, 0, 0);

but in this case you would need to trap the message in the
second application using the following code instead:

  <br />
while (GetMessage(&msg, (HWND) NULL, 0, 0)) <br />
{<br />
  if (msg == my_message)<br />
  {<br />
    MessageBox(hwnd, "Someone sent me my_message", "Message", MB_OK);<br />
  }<br />
  else<br />
  {<br />
    TranslateMessage(&msg);<br />
    DispatchMessage(&msg);<br />
  }<br />
}<br />

Jussi Jumppanen
Author of: Zeus for Windows, Win32 (Brief, WordStar, Emacs) Text Editor
"The C/C++, Java, HTML, Pascal, Cobol, Fortran programmer's text editor"
Home Page: http://www.zeusedit.com
Hope this will help you.

Regards
Abhishake

Re: i Have two Question Pls Some one reply

ThatsAlok7-Jul-04 2:34

ThatsAlok

7-Jul-04 2:34

thanks abishek
but i am still not successful in doing this.

could you pls send me the sample project for both application at email address cocokola@rediffmail.com
thanks a lot

-----------------------------
"I Think It will Work"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: i Have two Question Pls Some one reply

David Crow7-Jul-04 2:57

David Crow

7-Jul-04 2:57

When using SendMessage() and PostMessage(), the ID of the message has historically been based on WM_USER, with newer applications starting to use WM_APP. While this certainly works, the possibnility exists for two applications (DLLs, actually) to send the same message, resulting in undesired behavior. Using WM_USER or WM_APP with SendMessageToDescendents() is also asking for trouble. The solution, therefore, is to use a registered message. It is guaranteed to be unique. The message only means something to the window that created it and the target window.

Read this article for more.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: i Have two Question Pls Some one reply

ThatsAlok7-Jul-04 4:29

ThatsAlok

7-Jul-04 4:29

thanks for wonderful article,my problem solved.

have you any idea abt SmartCard api's sir

-----------------------------
"I Think It will Work"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: i Have two Question Pls Some one reply

David Crow7-Jul-04 4:32

David Crow

7-Jul-04 4:32

Alok the programmer wrote:
have you any idea abt SmartCard api's sir

No.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: i Have two Question Pls Some one reply

Abhi Lahare7-Jul-04 2:58

Abhi Lahare

7-Jul-04 2:58

Hi Alok,

I don't have sample project. but take a look (if you have'nt before)at the example which is using RegisterWindowMessage() function. Here

Hope this help Smile | :)

Regards
Abhishake

Re: i Have two Question Pls Some one reply

ThatsAlok7-Jul-04 4:37

ThatsAlok

7-Jul-04 4:37

thanks yaar

-----------------------------
"I Think It will Work"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

how activex control is created?

Abhi Lahare6-Jul-04 23:43

Abhi Lahare

6-Jul-04 23:43

Hi All,

When some embeds the ATL ActiveX Control in the web page like

<object id="MyID" classid="CLSID: 9698F21D-F7A3-4968-B80C-850BEE451D3C" align="CENTER” height =" 100%"="" width="100%">

How the control creation and initialization is done internally.

Thanks in advance,
Abhi Lahare

How to Write Installer

Zeeshan Bilal6-Jul-04 23:37

Zeeshan Bilal

6-Jul-04 23:37

I write an installer using Visual Studio Installer
for VC++ 6 application.

but i want an interface as some installer have totaly Blue n maximized backgroud .
and aslo need a setup file
innstaller only make a msi file ..

2 :: During installation with installer msi file
it gives the eror on Client
that Failed to register MFC42D.dll .. i m copying MFCO42D.dll , MFC42D.dll and MSVCRTD.DLL on client

y it is giving this error

thanx

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