C / C++ / MFC

2-Apr-10 23:20

See here[^] for the MSDN documentation.

It's time for a new signature.

Modeless Dialog

rjkg2-Apr-10 21:25

rjkg

2-Apr-10 21:25

I am using modeless dialog box in my application . But When I minimize Main Application the modeless Dialog Box also minimize . It is also not showing in the task bar to switch to modeless dialog . How to avoid the dialogbox to minimize with the main Application .also how to show it in taskbar

Rajesh

Code-o-mat2-Apr-10 23:20

Code-o-mat

2-Apr-10 23:20

What is the parent of your dialog? The main window of your app? Try to make the desktop the parent and make sure your dialog has the "app window" style to make it appear on the taskbar.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

rjkg3-Apr-10 0:14

rjkg

3-Apr-10 0:14

Main Window Not destop. I could not find to change it to Desktop

Rajesh

Code-o-mat3-Apr-10 4:32

Code-o-mat

3-Apr-10 4:32

How did you create your modeless dialog? Show code please.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

C++ syntax: any idea to avoid overwriting functions of base class?

Adam Roderick J3-Apr-10 5:26

Adam Roderick J

3-Apr-10 5:26

As Code-o-mat suggested, you need to set the desktop as the parent for the Modeless dialog.
You have the parent on create itself.

CWnd* pParentWnd = GetDesktopWindow();
pMyModeless->Create( IDD_DIALOG1, pParentWnd );

Величие не Бога может быть недооценена.

includeh102-Apr-10 20:13

includeh10

2-Apr-10 20:13

Here is an example:

class AA
{
public:
	int GetTest(int i)	{return 1;}
};

class BB:public AA
{
public:
	int GetTest(char*ppp)	{return 1;}

	void MyTest()
	{
		GetTest(3);//error line
	}
};

I hope function GetTest(int) of base-class AA still can be used in sub-class BB as described in error line above.

any idea or it is impossible?

Re: C++ syntax: any idea to avoid overwriting functions of base class?

CPallini2-Apr-10 23:15

CPallini

2-Apr-10 23:15

includeh10 wrote:

GetTest(3);//error line

Change to:

AA::GetTest(3);

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: C++ syntax: any idea to avoid overwriting functions of base class?

Richard MacCutchan2-Apr-10 23:17

Re: C++ syntax: any idea to avoid overwriting functions of base class?

2-Apr-10 23:17

Try the following:

AA::GetTest(3);

It's time for a new signature.

includeh103-Apr-10 8:22

includeh10

3-Apr-10 8:22

not what I need

Re: C++ syntax: any idea to avoid overwriting functions of base class?

Richard MacCutchan3-Apr-10 9:22

Re: C++ syntax: any idea to avoid overwriting functions of base class?

3-Apr-10 9:22

includeh10 wrote:
not what I need

Well, thank you for such a detailed description of your problem!

Exactly how do you expect people to help you solve your problems without explaining what those problems are in detail. We cannot read your mind or guess at the results of your compilations or tests from thousands of miles distance.

It's time for a new signature.

Leif Simon Goodwin4-Apr-10 2:09

Leif Simon Goodwin

4-Apr-10 2:09

includeh10 wrote:
not what I need

Then what do you need? The previous answer is correct, and does answer your question. A virtual function is overridden, and the only way to access a base class implementation is to explicitly specify the base class as the other user has indicated.

Re: C++ syntax: any idea to avoid overwriting functions of base class?

Bernódus Kristinsson24-Apr-10 14:27

Bernódus Kristinsson

24-Apr-10 14:27

in class BB add: using A::GetTest;

can't run unicode/normalize example

permutations2-Apr-10 16:09

permutations

2-Apr-10 16:09

I'm trying to run some sample code from the Microsoft site that demonstrates Unicode normalization:

http://msdn.microsoft.com/en-us/library/dd319092(v=VS.85).aspx[^]

It compiles, but I get two link errors:

Linking...
UnicodeTest.obj : error LNK2019: unresolved external symbol __imp__NormalizeString@20 referenced in function "void __cdecl TryNormalization(enum _NORM_FORM,wchar_t *)" (?TryNormalization@@YAXW4_NORM_FORM@@PA_W@Z)
UnicodeTest.obj : error LNK2019: unresolved external symbol __imp__IsNormalizedString@12 referenced in function "void __cdecl TryNormalization(enum _NORM_FORM,wchar_t *)" (?TryNormalization@@YAXW4_NORM_FORM@@PA_W@Z)
Debug\UnicodeTest.exe : fatal error LNK1120: 2 unresolved externals

The DLL with these functions is on my system here:

C:\Windows\System32\normaliz.dll

So why am I getting the link errors? If I try to define the stuff it says is not defined, I then get an error that it's already defined. Confused | :confused:

Re: can't run unicode/normalize example

Adam Roderick J2-Apr-10 18:17

Adam Roderick J

2-Apr-10 18:17

I never used NLS, but expect NLS to have some lib, mostly Normaliz.lib.
U have linking error, so try after including Normaliz.lib for linking.

Величие не Бога может быть недооценена.

Redefination error [modified]

darc koder2-Apr-10 9:47

darc koder

2-Apr-10 9:47

i'm stuck with this problem

well i made this header "shapes.h"

#ifndef SHAPES_H
#define SHAPES_H

#define maxC 80
#define maxV 25
#define maxP 150

struct circles
{
int count;
float radius[maxC];
b2Vec2 center[maxC];
};

struct polygon
{
int count;
int vertex_count[maxV];
b2Vec2 vertex[maxP][maxV];
};

circles cl;
polygon pg;

#endif

sry for lame data structure but had to take like that

i've included it in my main.cpp

and thr's another header "simulate.h"

that needs to be included in "main.cpp"

now the problem is i have to include "shapes.h" in "simulate.h" too.. but when i do that i get error

1>simulate.obj : error LNK2005: "struct polygon pg" (?pg@@3Upolygon@@A) already defined in main.obj
1>simulate.obj : error LNK2005: "struct circles cl" (?cl@@3Ucircles@@A) already defined in main.obj
1>editor/Debug\editor.exe : fatal error LNK1169: one or more multiply defined symbols found

i tried removing "shapes.h" from "main.cpp" with "simulate.h" included in "main.cpp" and "shapes.h" included in "simulate.h" but still get the same error.

please help... i'm using Visual Studio 2008

modified on Friday, April 2, 2010 3:57 PM

Rick York2-Apr-10 10:18

Rick York

2-Apr-10 10:18

There are two ways to deal with this. One is to put the word "extern" in front of the declarations in the header file and then in one and ONLY one place (main.cpp most likely) add those declarations again without the "extern" in front of them.

The second option is to do this -

In the header file :

#ifdef DECLARE_GLOBALS
#define GLOBAL
#else
#define GLOBAL extern
#endif

// define structures here ...

// now declare instances

GLOBAL circles cl;
GLOBAL polygon pg;

Then in just ONE of the .cpp files, again like main.cpp, do this :

#define DECLARE_GLOBALS
#include "shapes.h"

This scheme can work with virtually any global variables if you really need to use them.

darc koder2-Apr-10 10:40

darc koder

2-Apr-10 10:40

may be i did someting wrong but with what u have told i'm getting the error

1>main.obj : error LNK2001: unresolved external symbol "struct polygon pg" (?pg@@3Upolygon@@A)
1>main.obj : error LNK2001: unresolved external symbol "struct circles cl" (?cl@@3Ucircles@@A)
1>editor/Debug\editor.exe : fatal error LNK1120: 2 unresolved externals

please tell me how should i include my headers now... both in main.cpp and simulate.h ir is thr any other way

Rick York2-Apr-10 10:52

Rick York

2-Apr-10 10:52

If you have an unresolved external error from the linker then you did not do what I said to exactly. Copy and paste the two definitions I showed in the previous post and put them where I said they need to go and it should work fine. I have used this technique for a long time with several different compilers and not had any problems.

Tim Craig2-Apr-10 14:09

Tim Craig

2-Apr-10 14:09

In addition to what Rick has been telling you, maybe you should spend some time studying the difference between definition and declaration? Possibly something about storage classifiers and scope?

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

Duplicate Handle to get Real Process Handle

«_Superman_»2-Apr-10 15:27

«_Superman_»

2-Apr-10 15:27

It is not a good idea to create global variables inside a header file.
So create a shapes.cpp file and put the global variables inside them.
In the shapes.h header file put the extern keyword before the global variable creation statement as mentioned in the other posts.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

ForNow2-Apr-10 8:29

ForNow

2-Apr-10 8:29

Hi,

I have read Jeffery Richter book On Duplicating Object Handles and am still confused how to get a real process handle

so...

If I am in a Childprocess trying to duplicate its handle for the Parent

I tried the following code in the Child Process

p.s. can some one point to where the documentation is for for using code tags for code snipets

I was sure it was on the menu bar from the Home page .....

<br />
<br />
       snap_shot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);<br />
<br />
        process32.dwSize = sizeof(PROCESSENTRY32);<br />
<br />
        return_cde =     Process32First(snap_shot,&process32);<br />
<br />
        pid = GetCurrentProcessId();       // Get Current process id<br />
<br />
        while(pid != process32.th32ProcessID)<br />
    {<br />
       return_cde = Process32Next(snap_shot,&process32);<br />
     }<br />
<br />
   parent_process = process32.th32ParentProcessID;<br />
<br />

then DuplicateHandle(GetCurrentProcesId(),GetCurrentProcessId(),parent_process,&child_process_handle_in_context_of_parent,0,FALSE,DUPLICATE_SAME_ACCESS);

no Luck

In Parent process

<br />
<br />
       return_code = CreateProcess(NULL,<br />
                        (LPCSTR) &child_buff[0],<br />
                          NULL,<br />
                          NULL,<br />
                          TRUE,<br />
                           NULL,<br />
                           NULL,<br />
                           NULL,<br />
                           &si,<br />
                           &pi);<br />
<br />
   global_area_handle =   pi.hProcess<br />
<br />
the DuplicateHandle(GetCurrentProcessId(),GetCurrentProcessId(),global_area_handle,&parent_in_context_of_child_handle,0,FALSE,DUPLICATE_SAME_ACCESS);<br />
<br />
no luck<br />
<br />

thankx

Re: Duplicate Handle to get Real Process Handle

Richard MacCutchan2-Apr-10 9:30