Re: Obtaining a handle to a textbox and populating it with text - C / C++ / MFC Discussion Boards

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Re: Struct array with string identifier

Oscar Rodriguez6-Jan-05 1:26

Oscar Rodriguez

6-Jan-05 1:26

another question how i implement this function??
do you can explain me???

please...

Thank you

Re: Struct array with string identifier

C^hris L^osinger6-Jan-05 2:10

C^hris L^osinger

6-Jan-05 2:10

there are many tutorials for std::map on the web. here is one: http://pegasus.rutgers.edu/~elflord/cpp/stdlib/map.html[^]

-c

Software | Cleek

Linking C libraries to C++?

balaclavabob4-Jan-05 8:48

balaclavabob

4-Jan-05 8:48

Pre-compiled a C library using msvc 6, blah.lib

In a new C++ project, include header and library location in Tools->Options->Directories, included header in the C++ file and include library in the Settings->Link tab

I get a linker error stating:

main.obj : error LNK2001: unresolved external symbol "int __cdecl hInitialise(int,struct HWND__ *,struct HDC__ *,unsigned int)" (?hInitialise@@YAHHPAUHWND__@@PAUHDC__@@I@Z)

I was not able to recompile the library into C++, cause of header problems....

Re: Linking C libraries to C++?

Chris Meech4-Jan-05 9:15

Chris Meech

4-Jan-05 9:15

This smells like a name mangling issue. Try to wrap the header file that contains your function declarations with

extern "C"
{
...
...   all of your functions
...
}

and then rebuild your library and then rebuild your app.

Chris Meech

I am Canadian. [heard in a local bar]

Gently arching his fishing rod back he moves the tip forward in a gentle arch releasing the line.... kersplunk [Doug Goulden]

Nice sig! [Tim Deveaux on Matt Newman's sig with a quote from me]

Re: Linking C libraries to C++?

balaclavabob4-Jan-05 10:40

balaclavabob

4-Jan-05 10:40

Thanks for the suggestion Chris, it didn't work.
The cpp files generated a host of other errors.

I googled extern "C" to see how else I could use it.

I tried putting the function declaration at the top of my file and used:
extern "C" int hInitialise(int count,
HWND window,
HDC screen,
unsigned int flags);
Got a compile error:
main.cpp(13) : error C2732: linkage specification contradicts earlier specification for 'hInitialise'
But I copied it straight from the header.... Confused | :confused:

Re: Linking C libraries to C++?

Michael Dunn4-Jan-05 10:50

Michael Dunn

4-Jan-05 10:50

You don't have to copy anything. In your C++ code do this:

extern "C"
{
#include "your_c_header.h"
}

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb
Magnae clunes mihi placent, nec possum de hac re mentiri.

Obtaining a handle to a textbox and populating it with text

willertron4-Jan-05 8:43

willertron

4-Jan-05 8:43

Hello,

I have got a handle to a window:

HWND hWndAddEditWindow = NULL;
hWndAddEditWindow = FindWindow(NULL,_T("New/Edit"));

I then open the window using the handle but I then need to populate the text boxes on the window who's names and ID's change each time.

I have been told that there is a way to get a handle to the first textbox, followed by the second textbox and so on, but I have not been able to work out how.

Please could someone help me out by telling me how I can get a handle to the first two textboxes in the window and send some text to them.

Many thanks
Willertron

www.willertron.com

Re: Obtaining a handle to a textbox and populating it with text

Blake Miller4-Jan-05 9:49

Blake Miller

4-Jan-05 9:49

The EnumChildWindows function enumerates the child windows that belong to the specified parent window by passing the handle to each child window, in turn, to an application-defined callback function. EnumChildWindows continues until the last child window is enumerated or the callback function returns FALSE.

You then could use the GetClassName function retrieves the name of the class to which the specified window belongs on each hWnd to make sure it is a text box.

Re: Obtaining a handle to a textbox and populating it with text

BlackDice4-Jan-05 11:11

BlackDice

4-Jan-05 11:11

after you get the handle to that window, use FindWindowEx() to go through the children. If you're using MFC, use mfc's CWnd version of FindWindowEx(). that way you can get a CWnd*, cast it to CEdit* and do whatever you want with it.

My articles

www.stillwaterexpress.com

BlackDice

fatal error C1010: from VC++ .net HELP!!!

bobhou4-Jan-05 8:07

bobhou

4-Jan-05 8:07

I start a new W32 console VC++ project from VC++ .net and
add a class (one .cpp and one .h files) to this project.
It gives an error when compiling:
fatal error C1010: unexpected end of file while looking for precompiled header directive

It doesn't happen in VC++ 6.0.

Could anybody pls help me on this?

Re: fatal error C1010: from VC++ .net HELP!!!

C^hris L^osinger4-Jan-05 10:08

C^hris L^osinger

4-Jan-05 10:08

try adding ...

#include "stdafx.h"

.. to the top of your .cpp

Software | Cleek

Re: fatal error C1010: from VC++ .net HELP!!!

Michael Dunn4-Jan-05 10:51

Michael Dunn

4-Jan-05 10:51

See the FAQ
2.5 I added some source files I got from someone else into my project and the compiler gives the error "C1010: unexpected end of file while looking for precompiled header directive." Why?[^]

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb
Magnae clunes mihi placent, nec possum de hac re mentiri.

Reading Memory

MaTTEvIL4-Jan-05 7:39

MaTTEvIL

4-Jan-05 7:39

Hi im searching an alternative Function for ReadProcessMemory. Someone got an idea ?

Re: Reading Memory

Graham Bradshaw4-Jan-05 13:17

Graham Bradshaw

4-Jan-05 13:17

Start by telling us why ReadProcessMemory isn't any good for you.

Re: Reading Memory

MaTTEvIL5-Jan-05 1:08

MaTTEvIL

5-Jan-05 1:08

Im trying to Read the memory from a Game that blocks the ReadProcessMemory function so I ne an Alternative.

How can I get access to a View class

fklldsvs4-Jan-05 7:36

fklldsvs

4-Jan-05 7:36

I have placed an WM_ONCHAR message in my view class handled by OnChar().
I would like to be able to call the OnChar() from my main class.
I have tried the "Access View Class from Anywhere" artical, but could not even get the example code to work.
Perhaps I could do as the thread below suggests, "Accessing property pages" (but I don't know what a property page), where data is placed in another class, where the view class could call and obtain it?

What I want to do is to send a character from the serial port (from my main class) to the OnChar() in the view class.

Thanks
John

Re: How can I get access to a View class

act_x4-Jan-05 8:25

act_x

4-Jan-05 8:25

Cant you try a PostMessage to the View Object

ViewObject->PostMessage(WM_ONCHAR , ....)

Re: How can I get access to a View class

fklldsvs4-Jan-05 9:38

fklldsvs

4-Jan-05 9:38

Thank you for that. That should work, I just don't know how to obtain the ViewObject part.

Re: How can I get access to a View class - How to obtain the View class ptr

Rahim Rattani4-Jan-05 22:57

Rahim Rattani

4-Jan-05 22:57

CMainFrame* pMainFrmWnd = (CMainFrame*)AfxGetMainWnd();<br />
ASSERT(pMainFrmWnd != NULL);<br />
CYourViewClass* pYourView = NULL;<br />
CWnd* pchildWnd = pMainFrmWnd->GetWindow(GW_CHILD);<br />
ASSERT(pchildWnd->GetSafeHwnd() != NULL);<br />
while(childWnd->GetSafeHwnd() != NULL)<br />
{<br />
ASSERT(childWnd->GetSafeHwnd() != NULL);<br />
if(childWnd->GetRuntimeClass()->m_lpszClassName == "CYourViewClass")<br />
{<br />
pYourView = (CYourViewClass*)childWnd;<br />
break;<br />
}<br />
childWnd = childWnd->GetWindow(GW_HWNDNEXT);<br />
}<br />
ASSERT(pYourView != NULL);

Rahim Rattani
Software Engineer,
Matrix Systems (Pvt) Ltd.,
Karachi - Pakistan

Fuzzy Logic and c++

faroqtam4-Jan-05 7:19

faroqtam

4-Jan-05 7:19

Hi
I need some help for fuzzy logic and how
i can implement the fuzzy set in c++ code
.
Any help can help me
Thanx for u.

On Earth nothing impossible,
while your mind running.

Faroqtam

Re: Fuzzy Logic and c++

robot2916-Dec-12 3:08

robot29

16-Dec-12 3:08

hi did u implement the fuzzy code ??? i need your help

Utilizing the Doc View FrameWork

act_x4-Jan-05 5:44

act_x

4-Jan-05 5:44

Time and again I have wanted to use the Doc View Arcitecutre in my apps , but the simplicity of Dialog apps has prevented me from doing this . Here is a scenario which I think calls for using the Doc View

I need two views objects (v1 and v2) of the same class VT that contains some tabular information (like a giant table of data) . v1 and v2 need to have the same representation but their data sources differ , otherwise UI wise they are exactly the same .

I need the following functionality

1. Individual display for V1 and v2

2. Vertical tiling of V1 and v2

3 Common Print preview functionality for information in v1 and v2 that I guess calls for a new View class VC

4 I do not need a Document class

What path (SDI ? MDI ? ) should i take as both do not provide for a Doc with multiple views .

Need some input
Thanks for your patience .

Engineering is the effort !

Re: Utilizing the Doc View FrameWork

BlackDice4-Jan-05 6:31

BlackDice

4-Jan-05 6:31

If you click the below link to 'My Articles', I have one I did called 'QuickQuery'. This is an SDI that starts off using a CFormView, but can switch to CListView. It's not the best code in the world, but it switches view types.

My articles

www.stillwaterexpress.com

BlackDice

Re: Utilizing the Doc View FrameWork

act_x4-Jan-05 7:22

act_x

4-Jan-05 7:22

Really nice article . I might need that functionality . Thank you . Now I can practise my SQL using ur tool ! Smile | :)

Re: Utilizing the Doc View FrameWork

BlackDice5-Jan-05 2:21

BlackDice

5-Jan-05 2:21

great! hope it helps

My articles

www.stillwaterexpress.com

BlackDice

Last Visit: 31-Dec-99 18:00 Last Update: 31-May-24 9:06

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